What is the --sched option? I was running as root. I now have the
lowlatency option enabled, also, so I have the true Planet CCRMA kernel now
- I had to turn off the automatic power management. But I still get
dropouts.

As for the flags, I don't know. I tried overriding from commandline and it
wouldn't do it, but I didn't look into it.

Original Message:
-----------------
From: stevenyi stevenyi@csounds.com
Date: Sun, 16 May 2004 23:09:23 -0700
To: csound-dev@eartha.mills.edu
Subject: [CSOUND-DEV:4738] Re: Linux audio


Hi Michael, 

For dropouts, are you running as root and with --sched flag?  I'm
running a PIII-M 1.2ghz with 768megs ram and it's running in realtime
with these settings without any dropouts. 

Sidenote:  I just tried to run csound5 with examples/trappedrt.csd and
it took me a couple of minutes to realize that I wasn't able to set the
soundcard on it on the commandline because the settings in the CsOptions
was overriding what I fed in the commandline. Shouldn't flags fed in on
the command line override CsOptions?

Thanks,
steven


On Sun, 2004-05-16 at 08:16, gogins@pipeline.com wrote:
> Thanks, I understand your situation now. This is not good for Csound. Do
> you want to experiment with rtaudio in place of PortAudio?
> 
> I should add that I am still getting dropouts with ALSA. My Linux machine
> is a 1 gigahertz PIII with 256 megabytes RAM, and top shows only a slight
> load for rendering trappedrt.csd, so I am starting to wonder if the
> dropouts are a PortAudio problem and not a PC problem. 
> 
> How important is ASIO on Windows for Csound? Is this something that you
can
> live without, or wait for the PortAudio developers to do?
> 
> Original Message:
> -----------------
> From:  jpff@codemist.co.uk
> Date: Sun, 16 May 2004 07:07:58 +0100
> To: csound-dev@eartha.mills.edu, csound-dev@eartha.mills.edu
> Subject: [CSOUND-DEV:4727] Re: Linux audio
> 
> 
> >>>>> "gogins@pipeline" == gogins@pipeline com 
writes:
> 
>  gogins@pipeline> Well, I seem to recall that you said PortAudio
>  gogins@pipeline> reports only one interface.
> 
> No, I see exactly 2 devices, /dev/dsp and the sound card, just like
> you
> 
>  gogins@pipeline> I infer that PortAudio, OSS, and Csound do not play well
> together, but I 
>  gogins@pipeline> guess that PortAudio, ALSA, and Csound may well be quite
> usable - I am
>  gogins@pipeline> probably getting dropouts because my machine is still
old
> and slow, just
>  gogins@pipeline> not as old and slow as the old one! The aplay utility
> works just fine, so
>  gogins@pipeline> does xmms.
> 
> Yes, aplay works correctly.  What does not is csound creating a mono
> output, or a stereo file on the M-Audio (which is a 12 channel chip)
> The PA setup does not look at the .asoundrc file and so in my set ups
> I cannot select the SPDIF output on the Hamerfall or the analog output
> on the M-Audio.
> 
> ==John ffitch
> 
> 
> --------------------------------------------------------------------
> mail2web - Check your email from the web at
> http://mail2web.com/ .
> 
> 
> 


--------------------------------------------------------------------
mail2web - Check your email from the web at
http://mail2web.com/ .

--sched is a linux-only flag that attempts to "set real-time priority
and lock memory" (from the command-line list of flags csound
generates).  I've always found real-time performance really needs this
to not have any dropouts.  (BTW: I'm on a Planet CCRMA kernel as well)

steven


On Mon, 2004-05-17 at 06:56, gogins@pipeline.com wrote:
> What is the --sched option? I was running as root. I now have the
> lowlatency option enabled, also, so I have the true Planet CCRMA kernel now
> - I had to turn off the automatic power management. But I still get
> dropouts.
> 
> As for the flags, I don't know. I tried overriding from commandline and it
> wouldn't do it, but I didn't look into it.
> 
> Original Message:
> -----------------
> From: stevenyi stevenyi@csounds.com
> Date: Sun, 16 May 2004 23:09:23 -0700
> To: csound-dev@eartha.mills.edu
> Subject: [CSOUND-DEV:4738] Re: Linux audio
> 
> 
> Hi Michael, 
> 
> For dropouts, are you running as root and with --sched flag?  I'm
> running a PIII-M 1.2ghz with 768megs ram and it's running in realtime
> with these settings without any dropouts. 
> 
> Sidenote:  I just tried to run csound5 with examples/trappedrt.csd and
> it took me a couple of minutes to realize that I wasn't able to set the
> soundcard on it on the commandline because the settings in the CsOptions
> was overriding what I fed in the commandline. Shouldn't flags fed in on
> the command line override CsOptions?
> 
> Thanks,
> steven
> 
> 
> On Sun, 2004-05-16 at 08:16, gogins@pipeline.com wrote:
> > Thanks, I understand your situation now. This is not good for Csound. Do
> > you want to experiment with rtaudio in place of PortAudio?
> > 
> > I should add that I am still getting dropouts with ALSA. My Linux machine
> > is a 1 gigahertz PIII with 256 megabytes RAM, and top shows only a slight
> > load for rendering trappedrt.csd, so I am starting to wonder if the
> > dropouts are a PortAudio problem and not a PC problem. 
> > 
> > How important is ASIO on Windows for Csound? Is this something that you
> can
> > live without, or wait for the PortAudio developers to do?
> > 
> > Original Message:
> > -----------------
> > From:  jpff@codemist.co.uk
> > Date: Sun, 16 May 2004 07:07:58 +0100
> > To: csound-dev@eartha.mills.edu, csound-dev@eartha.mills.edu
> > Subject: [CSOUND-DEV:4727] Re: Linux audio
> > 
> > 
> > >>>>> "gogins@pipeline" == gogins@pipeline com 
> writes:
> > 
> >  gogins@pipeline> Well, I seem to recall that you said PortAudio
> >  gogins@pipeline> reports only one interface.
> > 
> > No, I see exactly 2 devices, /dev/dsp and the sound card, just like
> > you
> > 
> >  gogins@pipeline> I infer that PortAudio, OSS, and Csound do not play well
> > together, but I 
> >  gogins@pipeline> guess that PortAudio, ALSA, and Csound may well be quite
> > usable - I am
> >  gogins@pipeline> probably getting dropouts because my machine is still
> old
> > and slow, just
> >  gogins@pipeline> not as old and slow as the old one! The aplay utility
> > works just fine, so
> >  gogins@pipeline> does xmms.
> > 
> > Yes, aplay works correctly.  What does not is csound creating a mono
> > output, or a stereo file on the M-Audio (which is a 12 channel chip)
> > The PA setup does not look at the .asoundrc file and so in my set ups
> > I cannot select the SPDIF output on the Hamerfall or the analog output
> > on the M-Audio.
> > 
> > ==John ffitch
> > 
> > 
> > --------------------------------------------------------------------
> > mail2web - Check your email from the web at
> > http://mail2web.com/ .
> > 
> > 
> > 
> 
> 
> --------------------------------------------------------------------
> mail2web - Check your email from the web at
> http://mail2web.com/ .
> 
> 
>