[slim] USB gets all the attention!

2009-08-04 Thread earwaxer

I dont know about the rest of the wireless/ethernet PC based music
server folks out there, but I am definitely feeling a huge bias in the
audiophile community toward wired PC as music server connections, and by
far the most popular being USB! I'm not big on conspiracy stuff, but for
sure USB technologies are getting the add bucks on the various hi-fi
sites and in mags. Possibly it is cheaper and easier to utilize. I'm not
sure. 

It just seems to me that wireless has so many advantages, I cant help
but see any wired protocol as a first step in the PC as digital front
end trend, with wireless digital transmission being the goal. 

Wires have always been an overall better choice for analog
transmission. Digital lends itself to being transmitted in bit perfect
fashion over wifi. Forget about the jitter issue, and
clocking/re-clocking that plagues wired protocols. 

If I am missing something please let me know! I know wifi protocols are
hard to get right, as has been discussed by USB DAC engineers on other
sites. 

I have had the transporter now for about 2 months. I couldnt be
happier! The convenience is huge. The sound is fantastic. Maybe a little
analytical, but nothing that cant be cured with a bit more of the
euphonics on the other end (replaced the 1st order cap in my maggies
with an obligatto cap from China - and use t-amp for amplification.

Cheers


-- 
earwaxer

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Re: [slim] USB gets all the attention!

2009-08-04 Thread radish

earwaxer;445828 Wrote: 
 
 Wires have always been an overall better choice for analog
 transmission. Digital lends itself to being transmitted in bit perfect
 fashion over wifi. Forget about the jitter issue, and
 clocking/re-clocking that plagues wired protocols. 

I think what you're talking about is sync vs async protocols, rather
than wired vs wireless. Ethernet is jitter  reclocking free regardless
of whether it's over a cable or not.

But I do agree that USB seems to me a strangely sub-optimal choice.


-- 
radish

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Re: [slim] USB gets all the attention!

2009-08-04 Thread dsdreamer

_USB_IS_EASY_TO_ADOPT_

USB is now ubiquitous on computers as a wired technology, and most
people already manage electronic music collections on the PCs already,
whether using iTunes, Windows Media Player, WinAmp, XMMS, Foobar2k,
Songbird or whatever.

Given that as a starting point, people wanting improved fidelity will
often take the path of least resistance and add a USB DAC and a USB
cable. It's a technology people are used to using for plugging in a
mouse, a digital camera or an MP3 player. People have the confidence to
adopt it, even if they are technically challenged. Better still, they
can keep using the same software to mange their library and avoid any
new learning curve there as well.

_*USB_Audio_Excellence_is_Much_More_Difficult*_ 

When you dig a bit deeper though, you find that most PC operating
systems mess with digital audio in no-so-benign ways, and make it very
hard to achieve bit-perfect reproduction to the DAC. The main issue is
that of resampling of digital audio by the OS to allow many different
sources of audio to mixed together in a combined audio feed to the sound
card. 

So while USB audio is a simple proposition on the surface, audiophile
USB gets to be a much more complex proposition with (Otachan's) ASIO 
DLLs, WASAPI for Vista,  tuning the Core Audio sample rate for the MAC
to the source material or application etc.  

_WHICH_CLOCK_IS_THE_MASTER_HERE?_

And if you care enough to avoid sample rate conversion by the PC
operating system, you will also want to avoid trying to slave a good
quality DAC clock to a poor quality PC clock source, which may lead to
spending serious money one of Gordon Rankin's DACs that can do
asynchronous-mode transfers and so avoid that pitfall.

But Squeezeboxes also do asynchronous mode transfers to fill their
internal buffers, and if you've invested in a Transporter you've been
able to preserve the merits of that architecture all the way through the
system to the analog domain (not so much if you use SPDIF output from a
cheaper SB client). 

_ASYNCHRONOUS_TRANSFER,_BIT_PERFECT_-AND-_WIRELESS_

Added to all this you get the convenience of wireless and can keep that
noisy computing equipment out of the listening room!


-- 
dsdreamer

--
Dreamer, easy in the chair that really fits you...

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Re: [slim] USB gets all the attention!

2009-08-04 Thread JJZolx

I think there are several reasons for this.

The USB DAC concept is much easier for them to grasp.  Much of that
crowd is over 50, 60 years old and computers are a mystery to them. 
Setting up a home network scares the hell out of them.  These are guys
who quite honestly ask whether defragmenting their hard drives will make
the music sound better and believe it 100% when somebody answers 'yes'. 
USB DACs are much closer to their comfort level.  The computer sends the
DAC a signal and the DAC makes sound.  It's a simple diagram.

The other big reason is that USB DACs are relatively simple to
implement by the manufacturer, and require minimal or no software
development.  This point is critical.  Development costs rise
exponentially once you have to develop all the software for the device. 
Just ask Logitech about this and see whether they had any idea what they
were getting into when they bought Slim Devices.  For the typical
boutique audio company consisting of a half dozen employees, this is one
of only a handful of avenues into the world of computer based music. 
The other is the standalone system, with internal sound card, and it too
is being beaten to death by a lot of characters packaging off the shelf
consumer components and making grandiose claims about the sonics.


-- 
JJZolx

Jim

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Re: [slim] USB gets all the attention!

2009-08-04 Thread Goodsounds

JJZolx;445838 Wrote: 
 I think there are several reasons for this.
 
 The USB DAC concept is much easier for them to grasp.  Much of that
 crowd is over 50, 60 years old and computers are a mystery to them. 
 Setting up a home network scares the hell out of them.  These are guys
 who quite honestly ask whether defragmenting their hard drives will make
 the music sound better and believe it 100% when somebody answers 'yes'. 
 USB DACs are much closer to their comfort level.  The computer sends the
 DAC a signal and the DAC makes sound.  It's a simple diagram.

I'll offer a different point of view, from the vantage point of someone
who I suspect is closer to the cited age range than you are ;-).

I think USB DACS are purchased by people who know more about computers
than about music/sound. Someone who knows nothing about PCs just uses
it as is, and doesn't tinker, add or subtract. People of my generation
who are afraid of computers don't use them to play music, and rarely
listen to music when using one.

They can buy music from the itunes store and take those tracks,
together with CDs ripped by itunes, and put them on an ipod. Listen to
that music in the house? Buy a radio with an ipod dock. Done.

Want to listen to music on your home entertainment system?  Use your CD
player, or use the audio channels that come on the TV cable. The TV guy
set that up when the installation was done.

Most whole-house sound systems I encounter (in houses of people older
than 30-something) are usually playing the residential equivalent of
Muzak, off the TV cable.

I've run across plenty of 20-30-40 somethings who asked for my help
with a home network. And no, I'm not a techie-type. I think that is less
age related than you think.


-- 
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Re: [slim] USB gets all the attention!

2009-08-04 Thread JJZolx

Goodsounds;445857 Wrote: 
 I think USB DACS are purchased by people who know more about computers
 than about music/sound. Someone who knows nothing about PCs just uses
 it as is, and doesn't tinker, add or subtract. People of my generation
 who are afraid of computers don't use them to play music, and rarely
 listen to music when using one.

I disagree.  I see _many_ threads in audiophile forums that begin
something like: Ok, I'm ready to try out this computer audio thing,
where do I start?  These aren't people who will be downloading MP3s
from the Apple Store.  These are people looking #1 for good sound.  Many
of them are genuinely surprised by the other aspects of computer-based
music: the convenience, random play, smart playlists, online music
services that let them discover new artists and music.

These people are often directed to the Squeezebox, Sonos, or some high
end servers like those from Linn or Cambridge, but many are directed by
other audiophiles toward USB DACs.  A Mac Mini and a USB DAC is a common
setup.  The Mac Mini can be quiet enough to reside in the listening
room.  Use iTunes, which is simple enough for almost anyone, attach some
audiophile-recommended USB DAC and you're off and running.


-- 
JJZolx

Jim

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Re: [slim] USB gets all the attention!

2009-08-04 Thread JJZolx

earwaxer;445828 Wrote: 
 It just seems to me that wireless has so many advantages, I cant help
 but see any wired protocol as a first step in the PC as digital front
 end trend, with wireless digital transmission being the goal. 
 
 Wires have always been an overall better choice for analog
 transmission. Digital lends itself to being transmitted in bit perfect
 fashion over wifi. Forget about the jitter issue, and
 clocking/re-clocking that plagues wired protocols. 
 
 If I am missing something please let me know! I know wifi protocols are
 hard to get right, as has been discussed by USB DAC engineers on other
 sites.

Even with a Squeezebox or Transporter that can connect both wirelessly
or via wired ethernet, the wired ethernet connection is sometimes the
only one that many people can use due to wireless interference and/or a
weak signal from their wifi router.  Someone experiencing dropouts is
usually directed to try a wired connection before doing anything else. 
This is maybe wireless music streaming's biggest drawback and is
something that many people just don't ever want to deal with, so they
avoid going wireless at all costs.  That reason alone erases many of the
advantages of running a networked player vs. a USB DAC.

The other thing often mentioned is concern about RFI and it's negative
impact on sound quality.  I think if you're the typical audiophile and
you read just one or two respected manufacturers deriding the use of
wifi because of the RFI produced, then you would never even consider
using it.


-- 
JJZolx

Jim

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Re: [slim] USB gets all the attention!

2009-08-04 Thread Goodsounds

JJZolx;445860 Wrote: 
 I disagree.  I see _many_ threads in audiophile forums that begin
 something like..

I'll defer to you, but I don't think I know too many computer-phobic
baby boomers who spend time in any internet forum. Or who would buy
something like a Mac mini that (I think) is neither a laptop nor a
desktop with screen and keyboard.  

We may just each be generalizing about different groups of people.


-- 
Goodsounds

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