Re: [Rosegarden-user] Holger's suggestion

2016-01-10 Thread Leszek Wroński 
Thank you very much again. Indeed Rosegarden displays a warning and tells
me to run 'sudo modprobe snd-rtctimer'. Unfortunately, I don't have that
module. I ran 'sudo modprobe snd-hrtimer' instead, but the warning still
appears. The 'details' section informs me "WARNING: using system timer with
only 250Hz resolution!"

I have an Intel Core i3-3220 CPU @ 3.30GHz × 4 PC with 8 GBs of RAM. I
didn't think I'd have CPU problems, but well, maybe that expectation was
wrong.

Still, now that I have the instruments set up, everytime I load up my file
the sound works properly and MIDI recording does too.

I will use you recommendation regarding JACK from now on.

Cheers,

Leszek.

On 10 January 2016 at 11:58, Holger Marzen  wrote:

> On Sun, 10 Jan 2016, Leszek Wroński wrote:
>
> > Thank you very much. Using the 'manage synth plugins' window I load the
> > FluidSynth DSSI plugin. Then using the editor I locate the soundfont and
> > choose the instrument. Then I can play and record with it with no
> problems.
> >
> > However issues start when I want to use a different instrument in a
> > different track. I hope the intended functionality is that I can click.
> say
> > on Track 1, and my keyboard will play the instrument associated with
> Track
> > 1, and when I click on Track 2, pressing the keys will play the
> instrument
> > associated with Track 2. So I want to have two different instruments from
> > the same soundfont associated with different tracks. The only way I was
> > able to do it was to load in the 'Manage Synth Plugins' menu the
> > Fluid-Synth DSSI plugin TWICE, for rows "1" and "2", and then load the
> > soundfont TWICE. I guess that's not the way to do this, since it's so
> > inefficient -- so how does one do this properly?
>
> I do it exactly that way. I have even the same soundfont in different
> tracks, because I want to mix, pan and process them idepently. No reverb
> for the kick drum, reverb for the snare and the toms.
>
> > But the bigger problem is, once I have one copy of the plugin doing its
> > magic for Track 1, and another working its tricks for Track 2, so that
> the
> > instruments I hear really change when I click the different tracks, then
> > all the sounds are crackled. When I save the *.rg file, exit the program,
> > relaunch and load it again, the sound is fine. How can I avoid doing this
> > all the time?
>
> I never experienced this. Maybe it's some kind of CPU problem, running
> on the limit. Do you have "RT" values (bottom of the Rosegarden window)
> bigger than 50? Try to double jackd's -p value (period size).
>
> > Now, I'm trying to avoid using Jack to make connections at all. Not using
> > any standalone synth, it seems that to hear anything, I need to connect,
> in
> > the 'MIDI Playback' menu 'Rosegarden playback device' to MIDI Through. Is
> > that right?
>
> The sounds that are produced by synth plugins go to audio connections,
> not MIDI connections. If you have no other programs or hardware that
> needs MIDI data then don't mind about Rosegarden's MIDI out, only audio.
>
> I recommend:
> - Start jackd manually, e.g. via Qjackctl or a shell script
> - Configure Rosegarden in Edit -> Preferences -> Audio
>   uncheck "Start JACK automatically"
>   check "Make default JACK connections for audio outputs"
>
> Regards
> Holger
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Re: [Rosegarden-user] Holger's suggestion

2016-01-10 Thread D. Michael McIntyre 
On 01/10/2016 06:30 AM, Leszek Wroński wrote:
> The 'details' section informs me "WARNING: using
> system timer with only 250Hz resolution!"

sudo dpkg -l linux-image-lowlatency linux-headers-lowlatency

(You typically only need the headers if you run hardware with 
proprietary drivers, like the non-free NVIDIA drivers.)

Reboot.

That will fix your timer resolution problem.

> I have an Intel Core i3-3220 CPU @ 3.30GHz × 4 PC with 8 GBs of RAM. I
> didn't think I'd have CPU problems, but well, maybe that expectation was
> wrong.

I have gotten Rosegarden and several supporting applications running on 
a laptop that cuts most of those specs in half.  That machine should 
give you a lot of power to spare.

If it doesn't seem like you have enough CPU, that's because you have an 
optimization/configuration/setup problem, not because your machine is 
inadequate.
-- 
D. Michael McIntyre

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Re: [Rosegarden-user] Holger's suggestion

2016-01-10 Thread Leszek Wroński 
Thank you very much. Using the 'manage synth plugins' window I load the
FluidSynth DSSI plugin. Then using the editor I locate the soundfont and
choose the instrument. Then I can play and record with it with no problems.

However issues start when I want to use a different instrument in a
different track. I hope the intended functionality is that I can click. say
on Track 1, and my keyboard will play the instrument associated with Track
1, and when I click on Track 2, pressing the keys will play the instrument
associated with Track 2. So I want to have two different instruments from
the same soundfont associated with different tracks. The only way I was
able to do it was to load in the 'Manage Synth Plugins' menu the
Fluid-Synth DSSI plugin TWICE, for rows "1" and "2", and then load the
soundfont TWICE. I guess that's not the way to do this, since it's so
inefficient -- so how does one do this properly?

But the bigger problem is, once I have one copy of the plugin doing its
magic for Track 1, and another working its tricks for Track 2, so that the
instruments I hear really change when I click the different tracks, then
all the sounds are crackled. When I save the *.rg file, exit the program,
relaunch and load it again, the sound is fine. How can I avoid doing this
all the time?

Now, I'm trying to avoid using Jack to make connections at all. Not using
any standalone synth, it seems that to hear anything, I need to connect, in
the 'MIDI Playback' menu 'Rosegarden playback device' to MIDI Through. Is
that right?

Thank you very much again,

Leszek.


> I recommend installing and loading fluidsynth-dssi into a
> Rosegarden-track of type "Synthesizer Plugin". Then load a GM soundfont
> into fluidsynth. Most distributions offer the package
> fluid-soundfont-gm, a very good soundfont that resides in
> /usr/share/sounds/sf2/FluidR3_GM.sf2 after installation.
>
> Using the plugin makes it simple to save the settings with your song and
> offers as low latency as possible.
>
> You can find other good soundfonts all over the web.
>
> Regards
> Holger
>
>
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Re: [Rosegarden-user] Holger's suggestion

2016-01-10 Thread Holger Marzen 
On Sun, 10 Jan 2016, Leszek Wroński wrote:

> Thank you very much again. Indeed Rosegarden displays a warning and tells
> me to run 'sudo modprobe snd-rtctimer'. Unfortunately, I don't have that
> module. I ran 'sudo modprobe snd-hrtimer' instead, but the warning still
> appears. The 'details' section informs me "WARNING: using system timer with
> only 250Hz resolution!"

That means that you use a standard kernel, not a low latency kernel.
There are 3 classes of kernels:

- standard for servers and desktops, usually with 250 HZ
- lowlatency kernels, usually with 1000 HZ
- realtime kernel, rocket science from outer space

Realtime kernels may be the kernels of choice when seeking for lowest
possible latencies for live use with a superfast interface.

I use and recommend lowlatency kernels. No rocket science. Just install
a lowlatency kernel. It's usually in the repository of your distribution
with "lowlatency" in its name.

Install, boot this kernel, enjoy.--
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Re: [Rosegarden-user] Holger's suggestion

2016-01-10 Thread Abrolag 
On Sun, 10 Jan 2016 12:37:28 +0100 (CET)
Holger Marzen  wrote:

> On Sun, 10 Jan 2016, Leszek Wroński wrote:
> 
> > Thank you very much again. Indeed Rosegarden displays a warning and tells
> > me to run 'sudo modprobe snd-rtctimer'. Unfortunately, I don't have that
> > module. I ran 'sudo modprobe snd-hrtimer' instead, but the warning still
> > appears. The 'details' section informs me "WARNING: using system timer with
> > only 250Hz resolution!"
> 
> That means that you use a standard kernel, not a low latency kernel.
> There are 3 classes of kernels:
> 
> - standard for servers and desktops, usually with 250 HZ
> - lowlatency kernels, usually with 1000 HZ
> - realtime kernel, rocket science from outer space
> 
> Realtime kernels may be the kernels of choice when seeking for lowest
> possible latencies for live use with a superfast interface.
> 
> I use and recommend lowlatency kernels. No rocket science. Just install
> a lowlatency kernel. It's usually in the repository of your distribution
> with "lowlatency" in its name.
> 
> Install, boot this kernel, enjoy.

You can still get very good results if you point Rosegarden's timer to your
soundcard, which *will* be a high resolution time source.
e.g. HW:PCH

-- 
W J G

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