Sorry to take so long to reply.  Pulseaudio was not installed on my system, but I installed it to try the code change mentioned below.  It did not work for me. I also installed jackd but again could not use another audio source concurrently with ChucK.  I did find that all works as I would like with Windows, but I am resistant to using Windows instead of Linux. Might have to swallow hard and use Windows to get through this course.  Thank you for all the help.


From: Harald <hg42@gmx.net>
To: ChucK Users Mailing List <chuck-users@lists.cs.princeton.edu>
Sent: Wednesday, November 6, 2013 4:12 AM
Subject: Re: [chuck-users] Problem with multiple audion sources

pulseaudio should usually work out of the box because most linux desktop distributions have this installed and configured, so it should be nice for beginners.

But musicians etc. / linux music distributions usually use jackd.

Apart from that alsa allows to create virtual devices to be routed through pulse or jack for those who know how to do it.
So alsa would be a good choice for all, but unfortunately desktop distributions don't come with alsa on top of pulse (from what I remember).

So there should be a choice between all these systems, probably with default to pulse and a BIG comment at a prominent place saying latency etc. may be bad and using jackd would be better. Users who can install jackd should also be able to choose a sound device in chuck.

General rule: choose a good default for beginners and allow advanced configuration for experts.


On Tue, Nov 5, 2013 at 11:51 PM, Morgan <morganiser@gmail.com> wrote:
My understanding is that chuck and or miniaudicle tries to 'own' your
soundcard... it doesn't like to share.... but these instructions tell
it to route through the mixer software

I had similar issues (on Mint KDE which i believe has alot in common
with KUbunutu), until I found and followed these directions for
editing the audio config before compiling  (from
https://class.coursera.org/chuck101-001/forum/thread?thread_id=130 )
-



"We need to edit one of the files to allow audio mixing through
PulseAudio, so that playing ChucK will not block other audio sources
such as the sound in the course videos.

Use a text-editor (preferably one that shows line-numbers) to open the file:

kate RtAudio/RtAudio.cpp

Find line 5660:

sprintf( name, "hw:%d,%d", card, subdevice );

Revise this to read:

//sprintf( name, "hw:%d,%d", card, subdevice );  // commented out
sprintf( name, "pulse" );

Find line 5699:

int openMode = SND_PCM_ASYNC;

Revise this to read:

int openMode = SND_PCM_ASYNC;
printf( "pcm name %s\n", name );  // line inserted

Save the file and close Kate (or whatever text-editor you used)."


THEN compile etc

I believe these directions should either be part of the linux readme
or better still be scripted into the source... ubuntu/mint being the
most popular distros thse days.

Morgan


On 5 November 2013 15:49,  <monon@att.net> wrote:
> I am a new chuck user and have just installed linux-alsa from source.  All
> works well as long as there is no other audio source active. If there is
> another active audio source active I get this message when, for example, I
> type in chuck --loop:
>
> [chuck]: RtApiAlsa::getDeviceInfo: snd_pcm_open error for device (hw:0,0),
> Device or resource busy.
>
> This seems to be a chuck issue as I can run multiple audio sources as long
> as one of them is not chuck. My concern is that I started a coursera course
> on chuck and would like to use chuck concurrently with the course.
>
> My operating system is Kubuntu Linux 12.04.
>
> Does anyone have any ideas?
>
> Thank you,
> Monon
>
>
> _______________________________________________
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> chuck-users@lists.cs.princeton.edu
> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
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