Re: [slim] text editor in piCore

[cliveb]

RobbH wrote: 
> 
> I think the vi editor is pre-installed. It's a good editor to know, but
> if you have never used it before, *it is frustrating and
> counter-intuitive*.
Understatement of the year!
vi vi vi is the number of the beast for good reason.



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Re: [slim] Digital out for RPi player

[cliveb]

shacky73 wrote: 
> I’d like to add quality digital out to a RPi 4B to use as music streamer
> for my stereo.  LMS running on RPi 4B with Ethernet connection to
> router.
> 
> I’d like to mimic a SB player with digital out to my MH tube DAC. 
> Receiving WiFi stream of ALAC files.
> 
> So I’m thinking a SPDIF (spelling?) board with maybe high quality WiFi
> to boot.
> 
> And if indicated high quality power supply - currently Canakit. 
> 
> What do you guys suggest?
HiFiBerry DIGI2 Pro works just fine, even on my old RPi2.

Warning: if you're interested in doing some processing (eg. parametric
EQ for room correction), don't get their DSP add-on board. Its filtering
algorithms create a weird low level rumbling. (I suppose they might have
fixed it since my bad experience). I do DRC by running through SOX on
LMS, which works well and requires no hardware purchase.



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Re: [slim] Digital Output on Transporter

[cliveb]

RussW wrote: 
> I have a Logitech Transporter SE and I'm trying to use it as a converter
> for PCM via TOSLINK to AES3 via AES/EBU output port.  Is it possible to
> do this?
> 
> The only output I can seem to get that's a digital signal via AES/EBU is
> streaming input from internal sources like LMS, Pandora, etc.  It won't
> seem to pass a digital input to the digital outputs.
> 
> Any help appreciated...
No, not supported by the TP firmware.

I asked the same question a while back, see
https://forums.slimdevices.com/showthread.php?114375-Transporter-digital-signal-transfer-question



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Re: [slim] mp3 track transition problem on Linux - clicks between tracks

[cliveb]

Do you have replaygain switched on, and if so is it set to track gain?
A sudden change in replaygain setting on track transition could cause a
"tick".



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Re: [slim] Moving On - In A Good Way

[cliveb]

ian_heys wrote: 
> 
> So for a no quibble price of £150.00 I have all the following for
> collection.
> ...
> 6.RASPBERRY PISERVER/PLAYER
> Pi4B 4GB with IQ Audio DAC+ and SamsungSSD T5 500 GB and power supply.
> Inopen case. No Micro SD Card orUSB Memory Card. Working when removed
> from  network a few days ago.
> ...
> 
I'm not wanting to buy your items, but do have a quick comment.
I know you said you didn't want to split things up and don't want to
sell on eBay, but...
Given that RPis are basically unobtainable from official sources, if you
did put your RPi4 on eBay, you'd probably get about £80 for it just by
itself.



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Re: [slim] PiCore

[cliveb]

d6jg wrote: 
> 
> Why is a reservation better than a static?
> 1) if you decide to change your subnet  - from 192.168.1.0 to
> 192.168.2.0 for example - then you would effectively divorce anything
> with a true staic IP from the network. Using a mac address based
> reservation would just require a device reboot to get it back.
> 2) you need to change DNS servers
> 3) you need to change the Gateway
OK, you make some good points and have convinced me.
Setting up things like DNS servers and gateways in a central place is of
course easier.
I hadn't really considered that because I just run a simple home network
and have never considered changing my subnet or DNS.
The only issue I see with reservations is the need to discover the MAC
addresses of all the devices, but I suppose that's not too onerous.



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Re: [slim] PiCore

[cliveb]

w3wilkes wrote: 
> I did not mean static. At least on my ASUS RT-AX86U and my Netgear
> DGND3700v1 at a 2nd location allows setting a reserved IP address
> outside the defined DHCP range. Note in the attached image DHCP range is
> .32-254 and reserved IP addresses are below this range. This ensures
> that DHCP cannot assign a reserved IP address to any device other than
> the target MAC address. The reserved addresses are within the same
> subnet. I consider this method to be a "best practice". At both
> locations I have my LMS server at 192.168.0.16 so I only need one entry
> for the LMS UI in all my browser favorites regardless of which location
> I'm at.
I'm sure there must be some good reason why such a complex facility
exists, but I can't see what's wrong with just giving those devices a
static IP so they don't even need to talk to a DHCP server.

Are there devices which can ONLY get an IP from DHCP? I can
sort of believe maybe some manufacturers might treat their customers
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Re: [slim] PiCore

[cliveb]

w3wilkes wrote: 
> Personally I do add reserved IP's outside the DHCP range. I've helped
> friends in the past and seen routers that wouldn't allow IP's outside
> the DHCP range so that's why I mentioned it. So in my case "who the
> hell" was forced by a particular router.
Just to make sure I've understood this right...
You've seen routers which block IP addresses in the same subnet as those
it's DHCP server gives out?
Please name them so we can avoid!



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Re: [slim] Neil Young at it again

[cliveb]

d6jg wrote: 
> I can see the take up of FLAC streaming causing a reversal of the
> “loudness war” to some extent as even the buds brigade now often opt for
> high end ones.
I seriously doubt it.
The consumers you're talking about buy into high-end buds and hi-res
streaming because they believe it's what they should do, but they
wouldn't recognise good sound quality if it smacked them in the mouth.
Indeed, they are now so used to hypercompressed trash that it's what
they think good sound quality is.
Even today's crop of young mastering engineers seem to have drunk the
kool-aid. "Everything louder than everything else" is the new dogma.



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Re: [slim] PiCore

[cliveb]

w3wilkes wrote: 
> Another good reason to go reserved IP address at the router is if your
> target device is offline and some other device connects the router the
> router may assign the static IP address you've set in your player. Then
> when you bring the player back online you would have an IP address
> conflict with the other device. This won't happen when using the
> reserved IP address method at the router.
I'm sorry, but who the hell allows their DHCP server to hand out
addresses in the same range as the static addresses they use? If you
know how to reserve IP addresses based on MAC address, you must be
capable of restricting the DHCP pool.



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Re: [slim] Neil Young at it again

[cliveb]

Back to the original topic regarding Neil Young's reaction to Joe
Regan.

What's just happened is a good demonstration of why people shouldn't
rely on streaming services as their music source. Anyone who gets their
music from Spotify and likes to listen to Neil Young (and maybe Joni
Mitchell soon) is hosed. Unless you have the music in your possession,
there's no telling when it might just disappear.



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Re: [slim] Lms

[cliveb]

Paul Webster wrote: 
> Do you have MAI (Music and Artist Information) plugin installed?
No.

The only plugins that I use are PowerSave and PowerSwitchII, and one
that I wrote myself to control the Meridian 218.



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Re: [slim] Lms

[cliveb]

bpa wrote: 
> This is OK if you are running a system which makes no use of internet
> services or external connections.
Ok, fair point. My usage is simple playback from a local music library.



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Re: [slim] Lms

[cliveb]

bpa wrote: 
> Out of curiousity,I got a CORE32 at launch price which was better value.
> It sits there working, no maintenance, updates happen by themselves
Pleased to hear you're happy with the CORE32.

My LMS runs on a Pi3. It sits there working, no maintenance, updates
don't happen at all because they don't need to happen. It's still
running piCorePlayer version 4.something, because it does what's
required, isn't broken and therefore doesn't need fixing. I've never
understood why people feel the need to constantly update perfectly
working systems.

PS. The Pi3 has more than enough grunt to run DRC. Peak CPU hits about
30% when new songs start, and once they're playing CPU usage is about 3%



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Re: [slim] Lms

[cliveb]

P Nelson wrote: 
> I cannot confirm this because I don't have one, but would polyvection
> CORE32 be the easiest way to run LMS?
While the Polyvection players look decent value, I can't see how the
price of the CORE32 server can be justified. Setting up piCorePlayer as
a LMS server on a RPi really is child's play, and can be done for less
than half the cost of a CORE32.



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Re: [slim] Rational Lounge Integration of LMS and TV Audio

[cliveb]

Labarum wrote: 
> But tell me about the headphone socket on the Pi4, please. I plugged in
> a pair of cheap, sensitive headphones  - nothing. I turned the software
> volume control right up and could hear the music - but it was not loud
> even at max volume. Is that 3.5mm jack socket more of a line out?
So I guess you're experimenting with the Pi4 as a player in addition to
using it as your LMS server?

I've never used a Pi4 as a player, but I did once use an old Pi1 as a
player, and can confirm that the 3.5mm output on that was line level.
I can't see any reason why they'd change the purpose of the 3.5mm output
on later models.



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Re: [slim] Rational Lounge Integration of LMS and TV Audio

[cliveb]

Labarum wrote: 
> Having turned my old PC off in favour of a Raspberry Pi to run LMS I am
> wondering if I am hearing a cleaner sound, not that I thought there was
> any mush there before.
> 
> I am now using LMS with Castbridge on rPi to a Google Chromecast Audio
> dongle, and using an optical link into a Beresford 7510 DAC driving a
> pair of Sennheiser HD25 headphones.
> 
> Is that possible or probable? The Windows PC could have been injecting
> some digital noise into the stream. I am, though, suspicious even of my
> own subjective impressions when they are unsupported by measurements,
> which I cannot make.
> 
> But what is the general view?
> 
The general view is that you're imagining it.

LMS streams the data over TCP/IP.
The receiving player controls how the data is decoded and clocked.
Nothing can affect the timing before then, including any noise on the
data lines - if you're wondering about noise affecting jitter.

UNLESS...
Noise (either electrical and/or radiated EMI) manages to affect the
analogue stages of whatever eventually turns the digital data into
audio. 
Which in your case would be the Beresford DAC. I guess there is a
vanishingly small possibility that its analogue stages might get
affected by power line noise and/or EMI, and the Pi4 would have
different noise characteristics to the Windows PC.

But the difference you hear is overwhelmingly more likely to be due to
your expectations and/or state of mind. You've just installed a new toy
that you're pleased with - you are bound to be in a happy place and as a
result things sound nice.



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Re: [slim] Rational Lounge Integration of LMS and TV Audio

[cliveb]

Labarum wrote: 
> Well I have already said I hardly use the Windows Desktop anymore, but
> it is using more electricity than a Pi would use to run LMS better.
Yes, I understand the desire to move away from your old Windows PC. My
comment was in reference to you suggesting that you might run LMS on
your wife's laptop. That would be asking for trouble if she uses it as a
general purpose machine. Get a RPi (if you can find one in stock
anywhere) and stick piCorePlayer on it.

Labarum wrote: 
> And you got rid of the big ATCs - buckets of tears.
Indeed it was torture to let them go, but we moved house and they simply
didn't fit. When I crammed them into the lounge and tried them out, they
sounded thick and congested.
The Meridian M6s that replaced them are surprisingly listenable. Nowhere
near as capable, of course, but they do sound pretty damn good.



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Re: [slim] Rational Lounge Integration of LMS and TV Audio

[cliveb]

Ok now I understand that you're using Chromecast devices as virtual
squeezeboxes.
What's confusing me is why you want to change anything. What's wrong
with your current Beresford DAC?

Regarding moving the LMS server, I would strongly recommend not running
it on a Windows machine that's also being used for other general purpose
stuff.
If you go the piCorePlayer route, I can tell you that you don't need a
RPi4 - it works just fine on a RPi3. Lack of USB3 for the disk isn't an
issue - audio data rates are so micky-mouse that USB2 is plenty fast
enough. My RPi3 LMS server is even running some SOX filters for DRC and
the CPU is nowhere close to maxed out - typically around the 25% mark.



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Re: [slim] Rational Lounge Integration of LMS and TV Audio

[cliveb]

If you've got a decent DAC with multiple inputs, why not just feed the
output of your Squeezebox player into one input and the TV into another?
Most modern TVs have an optical output.

I don't really understand why any Chromecast devices need to be involved
- can you explain their purpose?



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Re: [slim] Adding a DAC to Transporter

[cliveb]

mftech wrote: 
> I'm using the AES output of the Transporter with the Merging NADAC.
> The DAC inside the Transporter is excellent quality, Sean Adams was
> smart enough to do an excellent implementation with the AKM DAC.
Are you aware that Sean Adams explicitly stated that the AES output is
technically inferior to the COAX? (Not that you'll notice any audible
difference).
He said that it was just included for completeness sake.



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Re: [slim] HiFi Berry DIGI and DAC PI HATs

[cliveb]

I can give you one data point from personal experience. My DIGI2 Pro
works just fine on a Pi2 and a Pi4 running piCorePlayer. (I've never
tried it on a Pi3)



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Re: [slim] LMS plugin allowing digital time delay

[cliveb]

nils92 wrote: 
> Thanks cliveb, I'm progressing !
> I managed to create an effective custom-convert file through SSH, and so
> could test your code.
> But, when using for instance the  instruction in the line
> code, I do indeed have a time delay effect of 1s, but this time delay is
> not applied to the right speaker as opposed to the left one, as I would
> need it to. Instead, it generates an echo of 1s of the audio stream for
> both left and right speakers. So left and right remain aligned. Perhaps
> "channel 1" is not pointing to left speaker, and "channel 2" to right
> speaker ?
Sorry, but I've never used the delay option with SOX, so I don't have
direct experience with how it might behave. Nor am I keen on fiddling
around with my own custom-convert file to try it out, so I'm afraid
you'll have to conduct your own experiments.

nils92 wrote: 
> I tried to sort things out with the sox manual, but to say the truth
> with my level of knowledge I'm having a bit of a hard time, as I do not
> find that instructions such as "multi-threaded", "no-clobber" are very
> much explicited...
multi-threaded just tells SOX to use multiple cores to do its
processing, if the CPU you're using has them, which might speed up
processing a touch. You don't have to include that option.

no-clobber causes SOX to prompt before overwriting an output file, which
is generally a good option to include. But in the context of using it
with LMS, it's pretty much redundant. Can't hurt to include it, though.



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Re: [slim] LMS plugin allowing digital time delay

[cliveb]

nils92 wrote: 
> Thanks very much cliveb
> 
> So from what I understood after a bit of search, I will have to 
> - activate C-3PO plugin
> - from the Picoreplayer LMS tab, I will load a custom convert file in a
> .txt format 
> - in this custom-convert, no need to copy the whole convert.conf file, I
> just have to add something like the following line to time-compensate
> for a 1 m speaker disalignment : [sox] delay 0 0.003 (to add a 3 ms
> delay to the second channel)
> 
> Is that the general idea ?
> 
> I don't know if sox will accept to handle 0.003 second, it would
> probably be better to input samples rather than seconds, but then the
> number of samples would depend upon the sample rate, wich makes it more
> complicated
I don't think the C-3PO plugin is relevant. I run SOX in a
custom-convert to do room correction EQ and the C-3PO plugin is not
active in my LMS (which is running in pCP on a RPi3).

You're right that you don't need to replicate the standard convert.conf
in your custom-convert - it just needs to override the standard stuff
for the particular file types and players of interest. I'd say your file
should look something like:

Code:


  flc flc * 
  [sox] -q --multi-threaded --no-clobber -t flac $FILE$ -t flac - delay 0 0.003
  


This is assuming your source files are FLAC. If you use some other
format, you'd need to change the file type, eg. for MP3:

Code:


  mp3 flc * 
  [sox] -q --multi-threaded --no-clobber -t mp3 $FILE$ -t flac - delay 0 0.003
  


You make a good point about whether SOX will accept 0.003 to represent
3ms of delay, and the issue of different sample rates if you instead
specify samples.
I guess you'll just have to experiment.

One last comment: when I tried loading a custom-convert using pCP's
upload facility, it kept complaining that the file was the wrong format,
so I had to manually set it up with an editor while SSH'd into the
machine.



Until recently: Transporter -> ATC SCM100A, now sold :-(
House move forced change to: piCorePlayer(RPi2/HiFiBerry DIGI2 Pro) ->
Meridian 218 -> Meridian M6

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Re: [slim] LMS plugin allowing digital time delay

[cliveb]

nils92 wrote: 
> Hy
> I am new to LMS, wich I really enjoy and use with PcP on a RPi3.
> In my listening room, my left and right speakers have an axial
> dis-alignment (about 1 meter), depending from where I listen. So I would
> like to apply a time delay compensation of a few milliseconds to the
> closest of the speakers. That would of course have to be bit-perfect.
> I looked but did not see any plugin allowing this. Brutefir probably
> would do, but apparently the plugin is not accessible anymore ?
> Would you have any suggestion ?
> Thank you very much !
> Best
> Nils
SOX is available in pCP and has a *delay* option that will allow you to
specify different delays for different channels.
Excerpt from the SOX man page:

Code:


  delay {length}
  Delay one or more audio channels. length can specify a time or, if appended 
with an 's', a number of samples.
  Do not specify both time and samples delays in the same command.
  For example, delay 1.5 0 0.5 delays the first channel by 1.5 seconds, the 
third channel by 0.5 seconds,
  and leaves the second channel (and any other channels that may be present) 
un-delayed.
  


You'll need to set up a custom-convert file in LMS, but that's pretty
straightfoward.



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House move forced change to: piCorePlayer(RPi2/HiFiBerry DIGI2 Pro) ->
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Re: [slim] Problems with the digital coax output on Classic

[cliveb]

This is probably stating the obvious, but I presume you've tried a
different cable to confirm it's not that?



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House move forced change to: piCorePlayer(RPi2/HiFiBerry DIGI2
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Re: [slim] A Reminder: When your Squeezebox 3, Touch or *Boom* "stops working"...

[cliveb]

w3wilkes wrote: 
> I've had two Duet receiver power supplies fail over the last 12 years.
> The last time I had a failure I bought one of these cords and then I can
> just pick up another USB wall charger.
Congratulations on finding a way to run a Duet Receiver (9V) from a USB
supply (5V).



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House move forced change to: piCorePlayer(RPi2/HiFiBerry DIGI2
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Re: [slim] Looking for advice on Rasperry Pi piCore Player set up

[cliveb]

To the OP:
It's not clear from your photos whether you got network access when
booting the Pi with Raspbian.
I see the words "reached target network", but don't see the expected "IP
address is ..." message.

Here's what I'd do:
1. Connect the Pi to your monitor, to your router with an ethernet
cable, and connect a USB keyboard to the Pi.
2. Boot the Pi using Raspbian.
3. Log in using the keyboard. User name is *pi*, password is
*raspberry*
4. Run the command *ifconfig*. If you see "inet addr" listed for eth0
(probably 192.168.x.y, where x is likely to be 0 or 1, but could be
different, and y will be a number between 1 and 254), then you are
connected to a network and the Pi's ethernet port hardware is NOT
faulty.
5. You could also try this command: *ping google.com*. If you get
replies, your network is working fine and has access to the internet.
(The ping command will keep going; you can stop it by typing Ctrl+C).

You can then try exactly the same thing but boot the Pi using
piCorePlayer. Log in with username *tc* and password *piCore*

If you discover that the Pi has network access using Raspbian but not
with piCorePlayer, then I'm baffled - that really wouldn't make sense.



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House move forced change to: piCorePlayer(RPi2/HiFiBerry DIGI2
Pro/HiFiBerry DSP) -> Meridian 218 -> Meridian M6

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[slim] Selling my beloved Transporter

[cliveb]

I hope that this doesn't break any forum rules, but this is just a
heads-up that I'm selling my Transporter. It's an original Slim Devices
branded one, with transnav knob.

I recently moved and had to part with my ATC active monitors which
didn't fit in the new house :-(
They've been replaced by Meridian actives with digital inputs, so I no
longer need the TP's fabulous balanced analogue output.
I figured it would make sense to sell it to someone who could make
better use of it.

Here's a link to the eBay auction:
https://www.ebay.co.uk/itm/224512532721



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Re: [slim] LMS Plugin Development

[cliveb]

peterw wrote: 
> Here's some code from my DenonSerial plugin that I think should help:
> ...
> 
Thanks Peter, but as you'll see from my post #24, I now have it
working.
The problem was never intercepting and dealing with the power status
change - it was figuring out how to install the plugin so it was usable
on any kind of player.

Incidentally, I suspect that my desire to control the Meridian 218 is
pretty niche and therefore not worth the effort to release it as a 3rd
party plugin. (There's a whole heap of extra functionality that would be
needed to handle all the possile use cases that 218 owners might want).

But if anyone else wants it, drop me a PM and I can send you the code. I
think it should also work with a Meridian Audio Core 200 as that uses
the same protocol.



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Re: [slim] LMS Plugin Development

[cliveb]

mherger wrote: 
> > After restarting LMS, here's what happens:
> 
> You need to initialize the Settings in your plugin. Add
> 
> use Plugins::M218::Settings;
> 
> at the top of it, and in initPlugin() you do:
> 
>   Plugins::M218::Settings->new();
> 
> Instead of dealing with a pCP's folders I'd recommend you run LMS on 
> your local dev machine. This allows you to easily restart LMS without 
> having to copy files around etc.
Got home from being out for the afternoon to see your very quick
response, and tried your suggestion.

Success!
It was as simple as adding those extra lines into my plugin.
I will now start looking at adding the additional configuration settings
that it ought to have, and remove the hard-coded stuff.

Thank you so much for your assistance, much appreciated.

BTW, it's no problem for me to copy files to the pCP server using Samba,
and restarting LMS is no hassle. I'm not planning to be a regular plugin
developer, so this is all pretty much a one-off.



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Re: [slim] LMS Plugin Development

[cliveb]

bpa wrote: 
> Cache/Installed/Plugins is only used for plugin managed by Plugin
> manager downloaded from repositories.
> 
> If you look at WebUI Settings/Information - it lists the plugins
> directories. - you'll see a number of directories including
> Cached/InstalledPlugins/Plugins and Slim/Plugin. 
> 
> Manaully installed user plugins (what you want) go into a *Plugins*
> directory at a top level (exact location depends on OS)  - do not
> install in Slim/Plugin as that is for LMS supplied plugins.
On my LMS server (running on piCorePlayer, so the OS is piCore Linux),
WebUI/Settings/Information lists these plugin folders:
/USR/LOCAL/SLIMSERVER/CACHE/INSTALLEDPLUGINS/PLUGINS,
/USR/LOCAL/SLIMSERVER/PLUGINS, /USR/LOCAL/SLIMSERVER/CACHE/PLUGINS

So I presume that I should put my plugin into
*/usr/local/slimserver/Plugins* - but no such folder exists.

Is it that LMS is prepared to use plugins if the folder happens to be
there, but that the folder may not exist?
Can I just create that folder and put my plugin there? (I don't want to
just try it without some reassurance, in case it breaks LMS).



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Re: [slim] LMS Plugin Development

[cliveb]

mherger wrote: 
> 
> I think it would be good to share your code if you wanted some qualified
> 
> help. It's hard to follow what you do by your descriptions only.
OK, I've zipped up what I've created and attached it here.
I placed all of these files in the /usr/local/slimserver/Cache/Plugins
directory.
After restarting LMS, here's what happens:
- The plugins tab on the LMS web interface shows the new plugin as
active, and it has a Settings link
- Clicking the Settings link results in *404 Not Found:
plugins/Extensions/settings/plugins/M218/settings/player.html*
- The plugin is available on a SB3 via the Extras menu, and I can
enable/disable it as hoped
- When it's enabled on the SB3, it works as expected

I think if someone can help me figure out how to integrate the
player.html and Settings.pm files, I may have a chance of enabling the
plugin on other players (eg. SBR, Squeezelite, etc)

mherger wrote: 
> 
> > I tried moving my new plugin to
> > /usr/local/slimserver/Cache/InstalledPlugins/Plugins (which is where
> > PowerSave was installed), but that didn't help.
> 
> Don't mess with that folder. It's managed by LMS' plugin manager. It 
> doesn't like to get confused by you adding/removing stuff there.
OK, understood. I only tried there because that's where I found the
PowerSave plugin.


+---+
|Filename: M218.zip |
|Download: http://forums.slimdevices.com/attachment.php?attachmentid=34932|
+---+


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Re: [slim] LMS Plugin Development

[cliveb]

OK, making progress. I decided that all I really needed to do was switch
the Meridian 218 on & off with the Squeezebox player, so used Felix's
PowerSwitchII as a starting point.

I put my plugin into /usr/local/slimserver/Cache/Plugins, restarted LMS,
and the new plugin is listed as installed in the web interface Plugins
tab.
I was able to activate it on an SB3 I have via the Extras menu, and it
works - turns the Merdian 218 on & off as expected.

BUT... I want to use it with a SBR, and I can't see how it can be
activated on that. (Presumably I'd have the same issue if I wanted to
use it on a Squeezelite player).

(Note: I had already removed the code inherited from PowerSwitchII that
checks whether the player is a Transporter or SB2/3, but I don't think
that's relevant - I haven't even got as far as activating the plugin on
the SBR).

My next thought was that maybe the way PowerSwitchII is configured uses
some kind of legacy mechanism only available on the older players with a
display.

So I took a look at the PowerSave plugin (which I already have active on
the SBR) and noticed that it includes a PLAYER.HTML file that presents
the various options in the LMS Settings web interface, and a SETTINGS.PM
file that looks like it processes the settings selected in the
PLAYER.HTML page. So I built a simple equivalent and placed it with the
rest of my plugin. After restarting LMS, a SETTINGS option appeared next
to my new plugin, but clicking it results in:

Code:

404 Not Found: plugins/Extensions/settings/plugins/M218/settings/player.html


I had a poke around, but as far as I can see none of the directories on
the server called Extensions have anything to do with PowerSave in
them.

I tried moving my new plugin to
/usr/local/slimserver/Cache/InstalledPlugins/Plugins (which is where
PowerSave was installed), but that didn't help. 

So I'm kind of stuck at this point. There seem to be so many possible
places where the various files might belong. Can anyone can give some
more guidance?

If it's relevant, I'm using piCorePlayer as my server, running LMS 7.9.2



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Re: [slim] LMS Plugin Development

[cliveb]

mherger wrote: 
> > In the INSTALL.XML file for various plugins, I see an  attribute
> > containing a rather long hex number.
> > What is the significance of this, and how do I generate an
> appropriate
> > ID for my plugin?
> 
> It should be a unique string. I usually use 
> https://www.uuidgenerator.net to generate a UUID.
OK, happy to do that, but out of curiosity what is its actual purpose?
Is it mandatory?



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Re: [slim] LMS Plugin Development

[cliveb]

mherger wrote: 
> Your best bet 
> probably is to find a plugin which does similar things to what you want
> 
> to do, and go from there. *And ask questions here.*
I spent a bit of time writing a simple Android app to try out the
Meridian protocol, hence the delay in following up.

But I'm now ready to start developing the LMS plugin, and I do have a
question:

In the INSTALL.XML file for various plugins, I see an  attribute
containing a rather long hex number.
What is the significance of this, and how do I generate an appropriate
ID for my plugin?



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Re: [slim] LMS Plugin Development

[cliveb]

Thanks to everyone for all the useful tips.

peterw wrote: 
> I'm curious - do you have protocol specs? Is it this?
> https://www.meridian-audio.com/media/11318/meridian-automation-interface-for-ip-control-issue-4.pdf
Yes, that's the one.
As it happens, I only had an earlier version from 2017, so thanks for
the link to this later one.



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Re: [slim] LMS Plugin Development

[cliveb]

mherger wrote: 
> > Can anyone tell me if the wiki page at
> > https://wiki.slimdevices.com/index.php/DeveloperGuide.html is still
> the
> > right place to start (bearing in mind I'm running LMS 7.9)?
> > Or is there some more up-to-date guide around that I've not
> discovered?
> 
> Documentation for plugins is... inexistent or outdated. Your best bet 
> probably is to find a plugin which does similar things to what you want
> 
> to do, and go from there. And ask questions here.

Ah, right. Thanks for the heads up.

What I want to do is turn the Meridian speakers on & off when the player
is turned on & off, and adjust their volume.
So I think IR Blaster would be the place to start.
The difference is that the control signals are sent via TCP over the
network, rather than via an IR emitter.



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[slim] LMS Plugin Development

[cliveb]

I am about to embark on writing an LMS plugin to control the Meridian
218 I have recently acquired.

I have never built a SqueezeCenter/LMS plugin before, and have never
written anything in Perl before. But I am a (retired) software
developer, experienced with languages like C++, Java, PHP and the like,
so should be able to figure it out provided I can find the correct
documentation.

Can anyone tell me if the wiki page at
https://wiki.slimdevices.com/index.php/DeveloperGuide.html is still the
right place to start (bearing in mind I'm running LMS 7.9)?
Or is there some more up-to-date guide around that I've not discovered?



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Re: [slim] IR Blaster and Meridian 218

[cliveb]

cliveb wrote: 
> I know this is a long shot, but does anyone have any experience or
> knowledge about controlling a Merdian 218 using the IR Blaster plugin?
OK, seems that nobody has anything to say on this subject, but no
worries - I have now discovered the protocol for controlling the 218 via
its network connection.



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[slim] IR Blaster and Meridian 218

[cliveb]

I know this is a long shot, but does anyone have any experience or
knowledge about controlling a Merdian 218 using the IR Blaster plugin?



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Re: [slim] Squeezebox 2 keeps disconnecting

[cliveb]

Could be a dying power supply. When the voltage starts dropping,
squeezeboxes can behave in all sorts of weird ways. Dead PSUs are one of
the commonest failures.
(Note that measuring the PSU voltage without any load won't tell you
anything - the voltage only drops when the device is pulling current).



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Re: [slim] Transporter digital signal transfer question

[cliveb]

mftech wrote: 
> Transcoding means changing the type of format, SPDIF, Toslink to AES per
> exemple.
OK, I thought you might have been referring to things like altering
sample rates and bit depths.

mftech wrote: 
> Typically this a feature handle outside the DAC chip.
Yes, but the Transporter is more than a DAC. It does a lot of processing
in the Xilinx PGA.

We know that its firmware can decode SPDIF, Toslink and AES/EBU (because
its digital inputs work).
And we know that its firmware can encode SPDIF, Toslink and AES/EBU
(because its digital outputs work).
We even know that its effects loop can send a signal out of the digital
outputs and read it back in through the digital inputs - so having both
running simultaneously is possible.

So IN PRINCIPLE, it should be straightforward to receive a signal
through a digital input and send it out to the digital outputs.
I appreciate that development of the TP's firmware has now stopped so
this will never happen.
I just find it surprising that (a) it wasn't included as standard, and
(b) it was never requested as an enhancement during the time when
updates were still being made.



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Re: [slim] Transporter digital signal transfer question

[cliveb]

Thanks for the replies:

slartibartfast wrote: 
> There is a "Digital Inputs" LMS plugin for the transporter.
Yes, I already use that, but it's not relevant to this issue - which was
whether there's a way to feed the selected digital input to the digital
outputs.

mftech wrote: 
> No transcoding available, only digital to analog.
Shame. I don't want transcoding - just have whatever digital input is
selected to be copied over unchanged to the digital outputs. I can't
think of any reason why that wouldn't be possible in principle.



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[slim] Transporter digital signal transfer question

[cliveb]

As an experiment I tried feeding my TV's toslink output into the
Transporter's optical input and expected the signal to appear at the
coax digital output.
It didn't.
(It DOES appear at the analogue outputs, so it's not that the toslink
input isn't working).

I had (perhaps naively) assumed that the TP would transfer any digital
input signal to its digital outputs, but that seems not to be the case.
Unless there's some configuration setting I've missed. Can anyone help?



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Re: [slim] possible to reverse L/R channels on a digital optical (TOSlink) connection?

[cliveb]

aubuti wrote: 
> On second thought, feeding the analog inputs from the analog outputs
> (and crossing L/R) probably won’t work, because I’m pretty sure both the
> optical and analog inputs will be active. So the L speaker would get the
> L channel from the optical and the R channel from the analog, and vice
> versa for the R speaker. I’ll double-check with the Audioengine folks,
> but probably need to look at one of the other solutions.
Thinking about it a bit more, you're probably right. Even if there's a
way to select which input is used, chances are that is the input which
would get fed to to analogue outputs. But still worth asking AE about
it.

I reckon you should open up the speaker with the electronics and see if
there's an easy way to swap the connections between amps and drive
units.



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Re: [slim] possible to reverse L/R channels on a digital optical (TOSlink) connection?

[cliveb]

aubuti wrote: 
> Maybe imaging isn't the best word here, but it would be playing the left
> channel out of the speaker on the right and vice versa. I confess that
> on much of my music I don't recall whether, for example, the lead
> guitarist is stage-left and the rhythm guitarist or keyboardist is
> stage-right. But on some of my best-loved recordings I do. 
> 
> These get flipped if I swap the speakers, because when using the optical
> input the speaker with the amp will always play the left channel and the
> passive speaker will always play the right channel.
Sorry, I misunderstood your original post. Of course swapping the
speakers will make the channels come out the wrong side.

I notice the HD6 has RCA analogue inputs and outputs, presumably as some
kind of passthrough facility.
I wonder if a toslink signal fed in appears at the analogue outputs, and
if so, whether you could feed those analogue outputs back into the
analogue inputs and reverse the channels that way? In other words, the
HD6's DAC might always be active, even if you've selected to use the
analogue inputs. Probably not, but it might be worth an experiment.

Something else you could try would be to open up the master speaker (I
see screws on the backplate in a picture) and see if the connections
between the internal amps and speakers are easily swappable - they may
well be push-on spade connectors that you could easily switch round.



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Re: [slim] possible to reverse L/R channels on a digital optical (TOSlink) connection?

[cliveb]

aubuti wrote: 
> So I could do away with the power and ethernet cables running across the
> floor -- and improve marital harmony -- if I switched the L/R speakers.
> But that would mess up the imaging. I've tried it, and on a lot of
> tracks it is noticeable, sometimes to the point of annoyance.
How can swapping the speakers mess with the imaging given that their
drive units are not offset? It simply doesn't make sense to me.



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Re: [slim] Balance

[cliveb]

philippe_44 wrote: 
> Do we know why there is no balance setting on LMS?
A Squeezebox is a source component. When did you last see a balance
control on a turntable, CD player, FM tuner, etc?



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Re: [slim] Need Help with a Curious USB A to B Cable with Squeezeite Settings

[cliveb]

scslite wrote: 
> ... Curious got back to me and their assessment is that their cable is
> just incompatible with the RPi platform.
Out of curiousity (no pun intended) I had a look at their website. These
guys are, like lots of boutique audiophile companies, a bunch of
charlatans.

If Curious publicise that their cable doesn't work on a RPi, it might
save some PCP users falling for their snake oil claims.



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Re: [slim] SB3: Switch-Off S/PDIF when SB3 in stand-by

[cliveb]

If you're prepared to use a trigger signal from the player to control
the power to your speakers (eg. using a relay), then you could use the
PowerSwitch plugin on the SB3 - this puts out a 3V DC signal on the
heaphone socket when the player is on.
piCorePlayer has a power on/off GPIO control facility, which can deliver
a 3.3V DC signal on the GPIO pin of your choice when the player is on.
If you use a DIGI+ HAT then you'd have to choose a GPIO pin that it
doesn't use and passes through.



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Re: [slim] Installing extra packages on piCorePlayer

[cliveb]

paul- wrote: 
> Squeezelite uses mmap by defaultthere are some cases with a 64bit
> kernel, where it doesn’t work.  I’ve not been very successful setting
> their automatically.
Should I interpret your comment to mean that perhaps the fact 7.0.0
worked fine out of the box with mmap=1 when 6.1.0 didn't could just be
down to luck?



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Re: [slim] Installing extra packages on piCorePlayer

[cliveb]

Just been doing a few more experiments.

Using piCorePlayer 6.1.0, I finally discovered that the critical step is
to change the fourth option on the ALSA output setting to 0. After
restarting squeezelite, everything just works, including the GPIO
toggling. No reboot required. Once I discovered this, a quick search of
the forums found a few threads where Paul had stated that mmap=1 doesn't
work on the Pi4B in 64 bit mode. I didn't even realise that 6.1.0 was 64
bit. (Or perhaps it is 32 bit and mmap=1 doesn't work on a Pi4B in any
mode?).

Can anyone explain what the mmap option actually does?
Weird that an audio output setting affects the GPIO control.

Anyhow, I then tried out piCorePlayer 7.0.0.
Both versions (standard - which I presume is 32 bit, and 64 bit) worked
straight out of the box, even with mmap set to 1. Setting the GPIO power
on/off worked without any issue. So I guess whatever the issue was with
mmap has been resolved in Squeezelite 1.9.8 (piCorePlayer 6.1.0 shows
that it uses Squeezelite 1.9.6).

But it is interesting to note that the non-working mmap setting seems to
affect other apparently unrelated subsystems - perhaps not just the GPIO
control. Presumably had Paul or Jeff been aware of this they'd have
pointed me in the right direction much sooner.

Ironic that if I had waited a few days to start playing around with this
and 7.0.0 had been released, none of this would have come to light. But
it has at least revealed a possibly useful piece of info for anyone else
who encounters the issue.



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Re: [slim] Installing extra packages on piCorePlayer

[cliveb]

Jeff07971 wrote: 
> I ALWAYS resize the fs to full sdcard capacity before doing anything
I did try that at one point, but it didn't seem to help.

Jeff07971 wrote: 
> Maybe its ANY operation rather than changing O/P device
I guess that's possible.

Jeff07971 wrote: 
> Edit2: I Used piCorePlayer7.0.0b6
I'll try using that version and see what happens.
But probably not for a couple of days now.
(Interesting that the default output device for you was CARD=Headphones
rather than CARD=ALSA. I'll check that when I try 7.0.0b6).

Merry Christmas!



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Re: [slim] Installing extra packages on piCorePlayer

[cliveb]

OK, today the GPIO pin suddenly started working as desired, but I had no
idea which of the many things I fiddled with had done the trick. 
So I've spent a lot of time experimenting, being very methodical to try
and find out what fixed it.

Here's what I found. Bear in mind this is on a RPi4 using piCorePlayer
6.1.0.

1. Flash SD card with a fresh piCorePlayer image and boot up.
2. SSH in and check some things:
a). GPIO 13 is in mode IN, voltage low.
b). ps -ef shows squeezelite running with these options: *-o
hw:CARD=ALSA -a 80 1*
3. Try playing a track: No audio, pause causes track to restart rather
than pause, seek skips to position but then plays back a loop of about 5
secs.
4. Set power on/off to GPIO 13, active high. Squeezelite restarts.
5. readall.sh now shows GPIO in mode OUT, voltage high (even though
player is off).
6. Switching player on & off makes no difference; GPIO 13 remains high
at all times.
7. ps -ef shows squeezelite with options: *-o hw:CARD=ALSA -a 80 1 -G 13
H*
8. Try playing a track: no change, behaviour as in (3) above.
9. Restart squeezelite: no change.
10. Reboot piCorePlayer: no change.
11. Change audio output to RPiDAC and save, then back to analog audio
and save. Squeezelite fails to restart.
12. Reboot.
13. Now we have a fully functioning player!
a). GPIO 13 behaves as required: voltage low when player is off, high
when player is on.
b). Playback works correctly: pause pauses, seek skips as it should.
c). ps -ef shows squeezelite options: *-o hw:CARD=ALSA -a 80 0 -G 13 H*

So it would seem that switching the audio output device is the crucial
step that gets everything going.
(I speculate that the reason others say "it just works" is perhaps
because they had already set their output device to something other than
the default analog audio).

I am also intruiged by the change in the parameters to the -a option
that happened.
That second parameter (0 instead of 1) is presumably the thing that got
the audio output working.
The documentation says that this is the "period count or size in bytes".
No idea what that means.

In summary, to get it working on the Pi4, the minimum sequence of steps
is:

1. Flash SD card with piCorePlayer, boot up.
2. Set power on/off to desired GPIO.
3. Set audio output to something else, save.
4. Set audio output back to analog, save.
5. Reboot.
6. Player now behaves as expected.

Mysteries that remain:

1. Why does changing the audio output fix the behaviour of the GPIO
control?
2. Why did pause and seek do the wrong things until the audio output was
fixed? (It's not like LMS has any idea that the player's output device
is set up wrong).

Thanks to everyone who helped me with this.
It was a bit of an ordeal, but of course orders of magnitude less work
than creating my own plugin, as I had originally thought I would need to
do!



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Re: [slim] Installing extra packages on piCorePlayer

[cliveb]

Just done some more experiments and wonder if the results might be at
all informative.

On the Pi4, I started with both the gpio-poweroff tweak and the
squeezelite power on/off option switched off.
I never touched the gpio-poweroff tweak during these tests.

Logged in via SSH, I checked the state of GPIO 13. It was set as an
input, so I set it to output:

Code:

pcp-gpio mode 13 out


Next, I ensured it was low:

Code:

pcp-gpio write 13 0


and verified that it was low:

Code:

pcp-gpio read 13


Next, I made sure that the player was switched off in the LMS web
interface.
Then I turned on the squeezelite power on/off option, setting the GPIO
pin as 13 and active high.
After saving, which restarted squeezelte, the LMS web interface showed
te player as OFF.
But when I ran:

Code:

pcp-gpio read 13


the pin was HIGH, even though the player was off.
Switching the player on & off in the LMS web interface made no
difference to the state of GPIO 13; it stayed HIGH at all times.
So the squeezelite power on/off option is clearly doing SOMETHING with
GPIO 13; just not what is expected.

Just out of interest, I tried the same experiment but choosing the
Active LOW option in the squeezelite power on/off setting.
This time GPIO 13 stayed LOW at all times.



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Re: [slim] Installing extra packages on piCorePlayer

[cliveb]

paul- wrote: 
> Turning the gpio-poweroff on then off would put things back in the
> default state.  There is nothing special that needs to be done.  However
> if two drivers are trying to claim the same GPIO, then things are
> unpredictable.
OK, thanks.

Q: is the gpio-poweroff option another way of achieving the same thing
as the Squeezelite power on/off setting?
(The options states "Refer to /mnt/mmcblk0p1/overlays/README", but that
file doesn't exist).

paul- wrote: 
> You've mentioned a pi2 and a pi4, I really think you've been swapping
> things around, and getting a wrong IP address.
No, I absolutely haven't been getting them mixed up. They were never
powered up at the same time. I know the IP addresses I used were
correct.


paul- wrote: 
> Check the information page on the LMS settings interface, it will list
> all known players connected (or those recently connected)  and their ip
> adresses.  Do you see more than one called piCorePlayer?
As far as I can see, my LMS (7.9.2) only lists the players currently
connected. Perhaps recently connected ones are shown in later versions
of LMS?

paul- wrote: 
> Oh, and if you are using internet streaming services, you really need to
> upgrade your LMS server.  If you are just using local music, then 7.9.2
> is fine.
I only use local music. 
Mind you, I did wonder if the fact that LMS is running on version 4.1.0
of piCorePlayer, but the players I'm testing are running version 6.1.0,
might be a factor.
But that wouldn't explain why the Pi2 started working and the Pi4 still
won't.
And I still don't understand why the Pi2 started working when it had
previously not been.

But if you are confident that updating LMS would solve this problem,
I'll give it a go.

I know it sounds suspicious, but I am 100% certain that I haven't been
getting any IP addresses wrong.
I just restarted the Pi4, it appears in LMS with an IP address of
192.168.0.107, and when I ssh to that address and play with pcp-gpio,
the pins work as expected.
But they don't respond to switching the player on & off from LMS.

I even went to the extent of re-writing the SD card with a fresh
piCorePlayer image and starting again from scratch, just in case
something had become corrupted. But it still doesn't work.



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Re: [slim] Installing extra packages on piCorePlayer

[cliveb]

OK, there are some developments...

First of all, when browsing around I discovered this on the Tweaks
page:

32642
I wondered if this had anything to do with things, so I tried activating
the gpio-poweroff tweak (setting the pin to 13) and rebooted. But it
didn't seem to do anything.
I deactivated it, rebooted, and then to my surprise the Squeezelite
power on/off started working (when switching the player on/off via the
LMS web interface).

Q: DOES ACTIVATING THE GPIO-POWEROFF TWEAK CAUSE SOMETHING TO GET
SWITCHED ON IN THE PI HARDWARE?

This was all using the Pi2.

So I returned to the Pi4 only to discover that the same sequence of
events did NOT cause the power on/off to start working.

OK, so now on to Paul's suggestion:
paul- wrote: 
> How many players do you have on your LMS, are you sure you are selecting
> the correct player when toggling power?
> 
> There are 2 command line tools provided with pcp.
> 
> pcp-gpio (which will let you do simple things like toggle and output or
> read an input.)
> readall.sh (This is a simple shell script that reads the current state
> of the gpio)
> 
Yes, I am sure it's the correct player. It's the only one called
"picoreplayer" in LMS :-)

I played around with pcp-gpio & readall.sh, and confirmed that the pins
are behaving as they should:
readall confirmed that GPIO was in OUT mode
"pcp-gpio write 13 1" sets GPIO13 to 3.25V, and "pcp-gpio write 13 0"
sets it to 0V.
This was verified by both the output from readall, and using my
multimeter to check the voltage.
But turning the player on & off in the LMS web interface didn't change
GPIO13.
The voltage shown on the multimeter stayed the same, and the V column in
the readall output didn't change. 
This was on the Pi4.

Thinking I might have imagined it working on the Pi2, I returned to that
and sure enough the Squeezelite power on/off IS working when the payer
is switched in the LMS web interface. (And just to verify things, it
also worked when turning the player on & off using the Squeezer app on
my phone).

So it's all a bit perplexing.

Responding to Jeff:
Jeff07971 wrote: 
> 
> @Cliveb What server are you using ?
> 
LMS 7.9.2, running in another piCorePlayer on a RPi3 in the loft.



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Re: [slim] Installing extra packages on piCorePlayer

[cliveb]

Jeff07971 wrote: 
> Just tried it on my Pi4 works and toggles fine, what meter are you using
> ?
> 
> 32639
This one:

32641

Stays at 3.27V at all times. (3.25V on the Pi4 I was trying before).


+---+
|Filename: meter.jpg|
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Re: [slim] Installing extra packages on piCorePlayer

[cliveb]

Jeff07971 wrote: 
> I Doubt it its fairly foolproof !
> 
> I don't have any Pi4's as players, I'll burn a card and test on a Pi4
> 
> Jeff
I've just tried on a Pi2 with the same results: GPIO 13 remains high at
all times.
I must be missing something that's glaringly obvious.



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Re: [slim] Installing extra packages on piCorePlayer

[cliveb]

Jeff07971 wrote: 
> Apart from setting the GPIO and the Active State (High or Low) in the
> Web settings page nothing else needs to be done.
> 
> I use GPIO13 as its right next to 0v and I know its not used by my
> Hifiberry Hat
> 
> Jeff
OK, thanks.
I've done exactly what you suggest and GPIO 13 (pin #33) stays
obstinately on 3.25V whether the player is on or off.
Have I done something stupid?

32634


+---+
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Re: [slim] Installing extra packages on piCorePlayer

[cliveb]

paul- wrote: 
> BCM pin numbering.  Which is the numbering almost everything uses.  
> https://pinout.xyz/ Almost nowhere in software is physical pin numbering
> used.
> 
> Are you sure nothing else is using GPIO 13?   D9 you have a DAC Hat
> installed?
OK, thanks. So GPIO 13 is physical pin #33.
I don't have any HAT installed. This is a fresh piCorePlayer install
with nothing added.
Should the Squeezelite power on/off setting just work, or do I need to
enable it somehow?

Incidentally, is there a recommendation for which GPIO pin would be best
to use for the power on/off setting?
I'm using a RPi4 if that's relevant.



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Re: [slim] Installing extra packages on piCorePlayer

[cliveb]

Jeff07971 wrote: 
> Hi Cliveb,
> 
> You don't actually have to do any scripting to do this its built into
> pCP (SL actually)
> 
> I use Powerswitch3 for my SB3's and pCP built in for my pCP based
> players
> 
> All drive 16A SSR's directly
> 
> Jeff
> 
> 32631
> 
Well, my apologies for not finding out about this! A genuinely
embarrassing face-palm moment on my part.

That said, I have now tried playing around with the Squeezelite Power
on/off GPIO settings, and haven't been able to make it work. Let me just
ask a couple of questions to make sure it does what I'm hoping for:

1. The help for the setting says: "Squeezelite will toggle this GPIO
when the Power On/Off button is pressed"
I interpret this to mean that when I click the power button for the
picoreplayer in the LMS web interface (and by extension, if I switch the
player on/off using a Duet controller or phone app such as Squeezer), it
should toggle the GPIO pin. Is that correct? I hope it is, because
that's exactly what I want it to do.

2. What numbering for the GPIO pins is used in this setting? Does it use
the physical hardware pin numbers, the (non-sequential) RPi numbering,
or some other scheme?
I ask this because I've tried both physical and RPi numbering, and
neither seem to work.
For example, if I set the Squeezelite to use GPIO 13, is this the
physical pin #13 (aka GPIO 27 in RPi-speak), or physical pin #33 (aka
GPIO 13)? I've tried checking both pins with a multimeter, and neither
seem to toggle. Pin #33 (GPIO 13) stays stubbornly high, and pin #13
(GPIO 27) stays stubbornly low.
Another way of asking the question:
If I set the Squeezelite power on/off to GPIO 13, which physical pin
will it control?



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[slim] Installing extra packages on piCorePlayer

[cliveb]

Not sure which forum I should ask this in: here, 3rd party software,
DIY?

Anyhow, I'm setting out on a project to develop a plugin that will
toggle a GPIO pin on a pi running piCorePlayer.
This is to replicate the behaviour of the old PowerSwitchII plugin on
SB2/SB3/TP, to drive a relay to switch amps on/off.

To do this I'll need to install some additional packages to get access
to the GPIO pins.
On Raspbian, I'd apt-get install them, but this isn't available on the
TinyLinux that piCoreplayer uses.

How do I go about installing additional packages into a piCorePlayer
system?
Or is there some other way to access the GPIO pins in TinyLinux?



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Re: [slim] Stuttering while players are synced - Possible Benchmark DAC3 issue

[cliveb]

>From the initial post, it sounds as if two things have been changed: the
server running LMS and a new DAC.
It's also not clear whether the same set of FLAC files playing on the
same group of players used to work before either of these changes.
Be systematic about the diagnosis. Go back to how things were before,
and introduce one change at a time. Take the guesswork out of it.
(FWIW, if you want a dedicated LMS server, Windows 10 is the last
platform I'd pick)



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Re: [slim] Seeking advice on multi-room systems for non-techies

[cliveb]

RobbH wrote: 
> Speaking of different ways of packaging the same thing, and getting back
> to my original question: I am marginally aware of other music systems
> based on Raspberry Pi, like Max2Play, but have never felt a need to
> investigate anything other than piCorePlayer. Should I be looking at
> some of these alternatives when the time comes to set up a permanent
> system for my friends? I see that some include LMS, but have never
> understood what advantages they might offer.
A few years ago I briefly experimented with Max2Play and concluded that
it was trying to cover too many bases and as a result required a fair
bit of configuration effort. So for the time being I stuck with
Vortexbox running on an old Acer Revo.

When I tried piCorePlayer on a RPi3 a couple of years back it was a
breeze to set up and the Vortexbox got retired. PCP seems specifically
aimed at the Squeezebox ecosystem and does it very well.



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Re: [slim] Seeking advice on multi-room systems for non-techies

[cliveb]

garym wrote: 
> And I'm with you: an "album" is (most of the time) a collection of songs
> that is an artistic statement of the artist, independent of medium.
Quite so. LP does not necessarily equate to album. There are LPs that
contain more than one album. Obvious example off the top of my head is
Kate Bush's 1985 LP, which contains the two albums "Hounds of Love" and
"The Ninth Wave": to my mind they are distinctly separate artistic
works.



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Re: [slim] Seeking advice on multi-room systems for non-techies

[cliveb]

garym wrote: 
> exactly. I over simplified.  But you're correct, it is best to use
> piCorePlayer to properly shutdown the rPi if the rPi is running LMS. 
> Not doing so (just pulling the plug), won't necessarily corrupt the SD
> card, but it might.  I *think* (not sure) that if one has LMS running
> but has the setting to transfer the LMS cache, etc. to the attached USB
> drive rather than having it on the SD card, the odds of corruption are
> less.
This is just one anecdotal data point...
I have piCorePlayer v4.1.0 running 24/7 on a RPi3B. The LMS cache is on
the external USB drive.
Over the last year or so, for various reasons (a faulty oven and a
faulty outdoor light) an RCD on the fusebox has tripped - I'd guess a
total of about 5 times.
On every occasion, when power was restored the RPi automatically
rebooted and piCorePlayer came back up without any drama and no
corruption.



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Re: [slim] My squeezebox problem

[cliveb]

The obvious first thing to try is connect with ethernet. If that works,
the problem is something to do with the wi-fi. There have been reports
of Squeezebox wi-fi cards coming loose and reseating them fixes the
issue.

If it still acts up over ethernet, the next thing to check is the power
supply. Squeezeboxes can behave in all manner of weird ways if the power
supply is dodgy.



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Re: [slim] Duet & SB Classic Persistent Buffering (seemingly not networking/bandwidth related)

[cliveb]

BreakTheStatic wrote: 
> I haven't tried ethernet, as I don't have any wired connections close
> enough to do so.
Hang on a minute! In your opening post you said these players are within
5ft of routers/APs. Last time I checked, routers tend to have ethernet
ports, and APs tend to be hooked into the network with ethernet. 
If you don't have any spare ethernet cables, unplug the AP and use its
cable into a player.

Procrastinating like this just makes life harder. You have a trivial way
of ruling in or out whether the problem is with the wi-fi. Why not try
it?



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Re: [slim] Duet & SB Classic Persistent Buffering (seemingly not networking/bandwidth related)

[cliveb]

Like all problems, the key to diagnosis is to be logical and systematic.
The first thing you must do is connect these players with ethernet and
see if the buffering stops. If it does, then you know it's a wi-fi
issue.



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Re: [slim] Stay safe

[cliveb]

d6jg wrote: 
> So far I have only had an “odd” feeling in my throat which I’ve noticed
> for the last 2/3 days but no cough and no fever whereas she has both.
> 
Interestingly that's exactly the same situation as in my household - my
wife is feeling a bit ropey with slight temperature and mild cough, plus
she aches all over. I feel fine except for a very slightly strange
feeling in my throat and nose. So we're self-isolating.

What bothers me is that whatever we may have, there's a good chance it
ISN'T Covid-19. Latest figures I've seen for UK testing is that of all
the tests that have been made, the positive rate is under 5%. That means
there are many people whose symptoms warranted testing but turned out
not to have Covid-19. So that means there's a good chance we're
suffering the inconvenience of self-isolation for no reason and after a
couple of weeks when we venture out again, we may very well still be
vulnerable.



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Re: [slim] Raspberry Pi 4 and DAC on daughterboard.

[cliveb]

Franck@ wrote: 
> 
> In fact, it is that I plan to install in the houses of my parents and my
> brother (who live quite far from my home) an equivalent solution. Today
> they have nothing. The natural solution would therefore be to buy a
> Raspberry Pi 4 if there was not this potential temperature problem. And
> as, I will have to "install/configure/debug" their devices, I prefer
> that my whole family has an identical installation, which means updating
> my own Raspberry Pi.
You do know that you can still buy the RPi3, don't you? Why not just get
your folks RPi3s?

(Yes, I understand that the RPi4 is higher spec for the same price, so
it would seem silly to buy RPi3s, but if it's the best tool for the
job)



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Re: [slim] Raspberry Pi 4 and DAC on daughterboard.

[cliveb]

Franck@ wrote: 
> 
> I am currently using a Raspberry Pi 3B+ with a Hifiberry DAC+ Pro card.
> This equipment hosts an LMS server, a Squeezelite player and Kodi
> (FullHD only). All this runs very well on Raspbian Buster, with hard
> drives directly connected via USB.
> 
> I plan to use a Raspberry 4 but I fear temperature concerns when used
> with an additional card.
So your current setup on a RPi3 is working just fine, but you're
thinking about switching to a RPi4 - with consequent possible heat
issues.

The obvious question is: Why? If everything is working fine now, why
change, especially if it might give you some overheating issues?

I know lots of people have given you reassurance about the heat, but
that's kind of besides the point. I still don't see why anyone would
want to change an existing setup that's working well. (I'm one of those
"if it ain't broke, don't fix it" kind of guys).



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Re: [slim] Affordable active speaker?

[cliveb]

gizmo1990 wrote: 
> Sorry, good point!:o
> 
> UK and around the £50 mark really. Unless that's totally not feasible.
> In which case, the cheapest options!
Your best bet is probably to look for nearfield monitors intended for
home studio use.
They tend to be cheaper than "HiFi" products of similar performance, but
on the downside can be less attractive in a domestic setting.
And you'll not get active speakers at the price point you want anywhere
else.
Have a look on the Thomann website
(https://www.thomann.de/gb/active_nearfield_monitors.html) for an idea
of the kind of things available.



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Re: [slim] SB2 has died

[cliveb]

alfista wrote: 
> Was that measured with the PSU connected to the SB2? A common failure
> mode of these are to measure fine on open output but buckling when asked
> to drive any load.
Take a bow, alfista! Turns out it was indeed the PSU.
I tried plugging in the PSU from a SB3 I also have, and everything is
fine.
Even the display is back working.
Thank you!

If there's an emoticon for a happy bunny, consider it placed here.



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[slim] SB2 has died

[cliveb]

My SB2 (bought back in 2005) seems to have finally turned up its toes.
A few weeks ago the display apparently failed, but the unit was still
working and playing OK.
Yesterday I went to use it and it was totally unresponsive, and not
showing as a player in LMS.
The power supply wall-wart is fine, supplying 5.08V.
This is a wired-only SB2, so it can't be due to a failed WiFi board.
I tried going through the motions of a factory reset and Xilinx reset,
and nothing appears to happen.
When I apply power, the optical output does NOT glow red.

So, I'm ready to accept it is done for and replace it with a RPi, but
before I do that is there anything I can check on the circuit board?
There are no visibly burned out components. What voltages can I check?



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Re: [slim] Sticky Surface on Remote Controls And The Rear Of A Touch

[cliveb]

Paul Webster wrote: 
> The Transporter came with the hard shiny plastic shell remote ... and
> that one is fine.
> It is the rounded remote that came with the SB1/2 (for me at least) that
> end up looking and feeling tacky.
Agreed. It's rubber-coated things that get sticky. My 14-year old SB2 is
now very sticky, but since I never touch it I've left it alone.

It's nothing to do with use. A quick Google suggests that it's due to
the vulcanisation of the rubber breaking down, so the rubber starts
turning back into its raw sticky state.

It's not just Squeezeboxes that are affected - anything with that
"soft-feel" rubber coating has the same problem. My Atomic ski helmet
got sticky and it took a long time and a lot of effort with isopropyl
alcohol to remove the coating.



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Re: [slim] Sticky Surface on Remote Controls And The Rear Of A Touch

[cliveb]

I can confirm that isopropyl alcohol does eventually remove the sticky
rubber coating, but it takes a lot of effort and you need to keep at
it.
Persevere on a small section to start with to get an idea of how much
elbow grease is required.



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Re: [slim] Pitastic

[cliveb]

w3wilkes wrote: 
> The Ferrari does make the journey a lot more fun and if I had the
> Ferrari I'd probably take the long way both to and from the store!
I'd guess that any journey in the wide open spaces of Utah is more fun
in a Ferrari.
I can assure you that it isn't in Watford!
Driving in the UK is no fun any more - it's now just a necessary chore
to get from A to B.
I gave up on sports cars a long time ago.



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Re: [slim] Pitastic

[cliveb]

d6jg wrote: 
> You say that Clive but all Pi variants before 4 feature a shared bus for
> the USB and LAN interfaces which is known to be problematic. The Pi4
> splits them and provides a full gigabit LAN and also includes USB3 ports
> enabling users to attach a full USB3 drive which is much faster than
> USB2. Apart from the overheating issue or non issue depending on how you
> look at it a Pi4 + USB3 drive should be much quicker than a Pi3 + USB3
> drive attached to a USB2 port.
All of the good things you mention about why the Pi4 is better than the
Pi3 are perfectly valid when considered in an appropriate context. I
applaud the fact they've decoupled the LAN from USB, and that it now has
USB3. (FWIW, I still think an onboard SATA controller would be the icing
on the cake, but we're still waiting for that).

But none of the Pi3's limitations you mention are significant in the
context of an LMS server. My LMS running on a Pi3 with library on an SSD
attached via USB2 has never, not once, ever, given me any trouble. It
supports 5 players no problem. You don't need gigabit ethernet and/or
USB3 speeds to stream the mickey-mouse data rates consumed by audio.

Using a more capable device when it's not justified, and suffering other
issues as a result, would be considered pretty daft in most walks of
life.
It's a bit like choosing to go to Tesco (Walmart for our US cousins) in
a Ferrari instead of a Ford - no advantage, and you end up burning more
fuel.



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Re: [slim] Pitastic

[cliveb]

Been on holiday for a couple of weeks, and am perplexed by the direction
this thread has taken while I was away.
It would seem that various people are trying out solutions to potential
overheating problems when running LMS on a Pi4.
I guess using a Pi4 then looking to fix any issues that arise is a case
of trying something for the fun of it,
but from a practical perspective, the solution is patently obvious:
don't use a Pi4.
A Pi3 is more than man enough for the task (even a Pi2 will do the job),
and it doesn't get hot.



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Re: [slim] Pitastic

[cliveb]

Daverz wrote: 
> If you have time to check, it would be interesting to know how big your
> library is (tracks and playing time) and and how long it takes to do a
> full clear and rescan.
I very rarely do a full clear & rescan - usually I just scan for changes
when I add new music to the server.

But FYI, I just fired one off:

Tracks: 14190
Albums: 1306
Playing Time: 1112:24:19
Clear+rescan time: 05:57

This is on a stock RPi 3 model B+ running piCorePlayer with the library
on a WD Blue SSD attached via USB.

(Now waiting in trepidation for my wife to complain that the "New Music"
list has been trashed :-)



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Re: [slim] Pitastic

[cliveb]

d6jg wrote: 
> I saw the announcement the other day. The increased RAM versions should
> be ideal for an LMS server with storage via USB3
My Pi3 works perfectly as an LMS server. And I've got an old Pi1 running
as a player.
The extra capability of the Pi4 is welcome for lots of applications, but
not really relevant to us.



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Re: [slim] Some Rasberry Pi / LMS questions for a complete beginner.

[cliveb]

edwin2006 wrote: 
> I've got a SB2 that's over 13 years old. Still working but very sticky
> (yuck)
That rubber coating they put on plastic which goes sticky over the years
is a pain.
If you never need to touch your SB2, then I guess it's no problem, but
if you want to remove the stickyness, isopropyl alcohol is a suitable
solvent. It takes a bit of effort, but does eventually get it off.

PS. I have a 14 year old SB2 (wired only) that is still going strong.



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Re: [slim] Transporter sound very corrupted -- HELP

[cliveb]

RonM wrote: 
> All my self generated flacs are at L5, and I re-encoded this one at that
> level. Made no difference, and as noted above made very little diff in
> file size, so presumably encoded at the same level originally.
When I suggested re-encoding at a lower rate I didn't mean a lower level
of FLAC compression. I meant a a lower sample rate. For example, if the
file that won't play is at 96khz, try sample rate converting it to
48khz, using something like SOX. It could be that the BT adapter you
have can't cope with the higher sample rate.

Remember that because the TP plays this file ok through its analogue
output, it cannot be a problem with the TP decoding the FLAC. By the
time the signal gets to the BT adapter it's plain linear PCM.



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Re: [slim] Transporter sound very corrupted -- HELP

[cliveb]

Logic needs to be applied.

1. It doesn't matter what the original encoding format was, the TP will
decode it to linear PCM before it appears at the optical output. So that
is a red herring.

2. Is the sample rate or bit depth different to other files that play ok
through the BT adapter? If it is, then try reencoding it to a lower
rate.



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Re: [slim] You know those songs that never seem to end...

[cliveb]

It's kind of spooky that, because the digits of pi go on forever and
never repeat, if you used them as digital samples then every piece of
music that has ever existed or ever can exist is lurking in there
somewhere.



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Re: [slim] SSD as USB storage - some feedback and thanks.

[cliveb]

w3wilkes wrote: 
> On the SSD finite read/write cycles... Most vendors now build their
> laptops with SSD main drives. I would think that if this were a real
> world concern SSD's wouldn't be the current preferred device type for
> laptops. I would think a music library on a SSD would have substantially
> less I/O activity than a PC's system drive. I'd say... NOT AN ISSUE!
It's only write cycles you need to worry about. Just reading from a SSD
is completely benign. Since a music server is used overwhelmingly for
reading rather than writing (you do listen more often than update the
library, I presume), then I'd say an LMS type of use is ideally suited
to SSDs - low power and completely silent.



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Re: [slim] SSD as USB storage - some feedback and thanks.

[cliveb]

rkrug wrote: 
> ...  plus this card
> https://www.audiophonics.fr/en/raspberry-pi-and-other-sbc-accessories/x820-v30-shield-sata-25-hddssd-for-raspberry-pi-p-13288.html
> 
> 
Just one comment. I think it's a bit disingenuous that the company
selling this card talks about USB3 and their specs claim 6Gb/s when they
must know that RPi only supports USB2.

That said, for a LMS setup USB2 speeds are more than adequate. I
recently built a new server with piCorePlayer and an SSD and it's doing
a grand job.



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Re: [slim] SD Card & Car: Track order wrong

[cliveb]

dolodobendan wrote: 
> Ogg Vorbis also works, but no gapless playback here either.
That's surprising given that your car, like mine, is a VW group one. Ogg
Vorbis gapless works just fine on my Skoda Bolero radio.
It's hard to fathom how the same manufacturer could contrive to use
different Vorbis decoding engines for different radios in their range.
Why bother to write two sets of code (or, more likely, why bother to use
two different Vorbis libraries)?
Talk about making unnecessary work for yourself!



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Re: [slim] SD Card & Car: Track order wrong

[cliveb]

dolodobendan wrote: 
> I haven't tested Vorbis yet. As on the one hand Unicode is supported
> (Chinese characters are displayed correctly), but on the other hand
> ID3v2.3 seems to make trouble, I wouldn't go so far as to make
> assumptions what's supported and what's not. You're probably right - but
> at this point, I'd rather test it.
I don't know what car you have, of course. Mine is a 2017 Skoda Fabia,
and it has the Bolero radio.
I can confirm that it supports gapless playback of Vorbis, but not MP3
(even with the LAME tags for gapless).
My guess is that any VW group car would be the same.



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Re: [slim] SD Card & Car: Track order wrong

[cliveb]

dolodobendan wrote: 
> Storage space is not an issue right now, but I could try Ogg Vorbis. I
> don't think the player supports gapless playback in any format, which,
> yes, annoys me. :p
Well, if it doesn't do gapless playback of FLAC or Vorbis, then it
doesn't support them, does it? Gapless playback is an intrinsic
attribute of FLAC and Vorbis.



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Re: [slim] piCorePlayer and plugins

[cliveb]

mherger wrote: 
> > No, I didn't try copying over anything. This was a fresh install of
> pCP,
> > and I used the pCP facilities to download and install LMS.
> > 
> > Are you saying that anything in
> > /usr/local/slimserver/Cache/InstalledPlugins/Plugins should just show
> > up?
> 
> No, what I'm saying is that nothing should be in there, unless you 
> installed that plugin through LMS, or by manually putting stuff in there
> 
> (which you should never do!).
OK, understood.
All I can say is that after installing pCP from a fresh SD card image,
and using pCP to download & install LMS, the PowerSave plugin was in
that InstalledPlugins folder.
Maybe Paul can shed some light on it?



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Re: [slim] piCorePlayer and plugins

[cliveb]

paul- wrote: 
> Look at the directories on the information tab.
> 
> The location for manual installed plugins for pCP is
> 
> /usr/local/slimserver/Cache/Plugins
THANKYOU THANKYOU THANKYOU!!!

That's what I needed to know - the correct folder to put it in.

PowerSave and PowerSwitchII are now working fine.



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Re: [slim] piCorePlayer and plugins

[cliveb]

mherger wrote: 
> >> How did the file get there if you can't see it in the list?
> >>
> > I have no idea. I assumed it was one of the standard plugins shipped
> > with LMS.
> > But the fact remains that the files are there on the server, but
> don't
> > show up in the Plugins tab on the web page.
> 
> Well, the plugin should just show up. If it's not, but it's in that 
> InstalledPlugins folder, then this sounds like something/someone tried 
> to be smart and f... things up. Did you copy over some of the LMS 
> configuration?
No, I didn't try copying over anything. This was a fresh install of pCP,
and I used the pCP facilities to download and install LMS.

Are you saying that anything in
/usr/local/slimserver/Cache/InstalledPlugins/Plugins should just show
up?

Also, how does LMS use the DownloadedPlugins directory?



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Re: [slim] piCorePlayer and plugins

[cliveb]

Jeff07971 wrote: 
> From "Information" page :-
> 
> 26833
> 
> So it would be  /usr/local/slimserver/Plugins
> 
> But this directory on pCP might not survive a reboot (as I said I only
> use this plugin on Centos)
> 
OK, that directory did not exist, so I created it and copied the
PowerSave directory over from the InstalledPlugins directory.
After an LMS restart, the plugin appeared and worked correctly.

Then after a reboot of pCP /usr/local/slimserver/Plugins had gone (so it
doesn't survive a reboot), but the plugin remained active.
I can only surmise that perhaps putting PowerSave into
/usr/local/slimserver/Plugins and restarting LMS caused it to get picked
up and stored somewhere else.

I then tried the same trick for the PowerSwitchII plugin, but after
initially appearing (and being made available on my test SB3), following
a reboot it's gone. So there must be something subtly different going
on. Experiments will continue...



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Re: [slim] piCorePlayer and plugins

[cliveb]

Jeff07971 wrote: 
> I don't think PowerSwitchII was ever availible on the plugins page
> without manually installing.
> 
> I use the later version https://github.com/motske/PowerSwitch3 but only
> on Centos7 so can't help with the pCP install
> 
Just had a look at that page and I see an issue regarding having
multiple switching devices on the network.
I have three (TP, SB2, SB3) that use the plugin, so think I'd better
stick with PowerSwitchII for the time being!



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Re: [slim] piCorePlayer and plugins

[cliveb]

mherger wrote: 
> > In /usr/local/slimserver/Cache/InstalledPlugins/Plugins, there is a
> > subdirectory PowerSave, which contains the expected files (Plugin.pm,
> > Settings.pm, install.xml, strings.txt). This happens to be one of the
> > plugins I want to use. But on the Plugins tab within the LMS server
> > settings web page, there is no mention of the PowerSave plugin.
> 
> How did the file get there if you can't see it in the list?
> 
I have no idea. I assumed it was one of the standard plugins shipped
with LMS.
But the fact remains that the files are there on the server, but don't
show up in the Plugins tab on the web page.

mherger wrote: 
> 
> > Also, there's another plugin I want to use - Felix's PowerSwitchII. I
> > have the source. Where do I need to place it for it to be picked up?
> 
> Isn't it available from the list either?
No, that one always had to be manually added.
On my old server (Vortexbox 1.10, SC 7.6.1), it sits in
/var/lib/squeezeboxserver/Plugins, but on piCorePlayer (LMS 7.9.2),
there appears to be no equivalent directory. 
So I was just asking where it needs to go.



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[slim] piCorePlayer and plugins

[cliveb]

I'm experimenting with building a new server using piCorePlayer.
Everything is going fine so far, with one exception: plugins.

I'm using piCorePlayer v4.1.0 (piCore v9.2pCP, LMS 7.9.2)

In /usr/local/slimserver/Cache/InstalledPlugins/Plugins, there is a
subdirectory PowerSave, which contains the expected files (Plugin.pm,
Settings.pm, install.xml, strings.txt). This happens to be one of the
plugins I want to use. But on the Plugins tab within the LMS server
settings web page, there is no mention of the PowerSave plugin.

What do I need to do to get PowerSave appear in the list of available
plugins?

Also, there's another plugin I want to use - Felix's PowerSwitchII. I
have the source. Where do I need to place it for it to be picked up?



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