13 Apr
2003
13 Apr
'03
8:25 p.m.
Hello!
Does alsa allow several programs to use one device, with soft mixing?
I have switched to alsa drivers, recompiled fluidsynth for alsa, and
tried to run it under KDE (in a Konsole su root). It failed:
===
ALSA lib pcm_hw.c:866:(snd_pcm_hw_open) open /dev/snd/pcmC0D0p failed:
Device or resource busy
fluidsynth: error: The "default" audio device is used by another
application
Failed to create the audio driver
===
Now, I thought I could get rid of arts and let alsa handle softmixing,
but... will it?
Well, I can install JACK. But I'm not only doing music creation. I want
to play MP3s via XMMS, watch videos with Xine, etc. Are there JACK
output plugins, at least, for XMMS and Xine?
--
Sincerely yours, Mikhail Ramendik
13 Apr
13 Apr
8:35 p.m.
On Sun, 2003-04-13 at 15:17, Mikhail Ramendik wrote:
Hello!
Does alsa allow several programs to use one device, with soft mixing?
Not really. But Jack, which runs on top of Alsa, does. fluidsynth
supports JAck, as well as ither soft synths like amSynth and
ZynAddSubFx.
Give Jack a try.
BTW - You will want to turn off system sounds and things like the arts
sound server if you're going to use Alsa/Jack.
9:09 p.m.
On Mon, 2003-04-14 at 02:26, Mark Knecht wrote:
Well... I do want some system sounds (at least a commandline player to
use from an instant messenger). And I want to use XMMS and Xine. Can
these be made to work with Jack?
I don't care for arts.
--
Sincerely yours, Mikhail Ramendik
Does alsa
allow several programs to use one device, with soft mixing?
Not really. But Jack, which runs on top of Alsa, does. fluidsynth
supports JAck, as well as ither soft synths like amSynth and
ZynAddSubFx.
Give Jack a try.
BTW - You will want to turn off system sounds and things like the arts
sound server if you're going to use Alsa/Jack. 
10:32 p.m.
They can via the LD_PRELOAD hack using the libjackasyn from Guenter
Geiger (it works like a charm for me). Once installed, simply use your
apps with the following syntax:
jacklaunch <appname> <flags...etc>
Hope this helps!
Ico
-----Original Message-----
From: linux-audio-user-admin(a)music.columbia.edu
[mailto:linux-audio-user-
admin(a)music.columbia.edu] On Behalf Of Mikhail
Ramendik
Sent: Sunday, April 13, 2003 7:01 PM
To: LinuxAudioUser list
Subject: Re: [linux-audio-user] ALSA device sharing?
On Mon, 2003-04-14 at 02:26, Mark Knecht wrote:
> > Does alsa allow several programs to use one device, with soft
mixing?
> >
>
> Not really. But Jack, which runs on top of Alsa, does. fluidsynth
> supports JAck, as well as ither soft synths like amSynth and
> ZynAddSubFx.
>
> Give Jack a try.
> BTW - You will want to turn off system sounds and things like the
arts
sound server
if you're going to use Alsa/Jack.
Well... I do want some system sounds (at least a commandline player to
use from an instant messenger). And I want to use XMMS and Xine. Can
these be made to work with Jack?
I don't care for arts.
--
Sincerely yours, Mikhail Ramendik 
14 Apr
14 Apr
4:48 a.m.
On Sun, 13 Apr 2003 20:22:34 -0400, Ivica Bukvic wrote / a écrit:
jacklaunch <appname> <flags...etc>
Hi
I'm so confused here: I was believing jack needed alsa to work. So if alsa is launched
before, xmms and xine should run fine because they see and use alsa/oss emulation.
What am I missing here?
cheers
Guy CLO~
-----------------------------------------------
#ICQ 37736372
#219055 http://counter.li.org
-----------------------------------------------
http://perso.wanadoo.fr/guy.clotilde/index.html
-----------------------------------------------
12:42 p.m.
On Sun, 13 Apr 2003 20:22:34 -0400, Ivica Bukvic wrote
/ a écrit:
alsa
jacklaunch <appname> <flags...etc>
Hi
I'm so confused here: I was believing jack needed alsa to work. So if is launched before, xmms and xine should run fine
because they see and
use
alsa/oss emulation.
What am I missing here?
It does, but once the alsa is running, and jackd is running on top of
alsa, you can use jacklaunch hack to open up a new full-duplex
connection to jackd even with the apps that do not natively support
jack's framework (regardless whether it is oss or alsa, I think -- I've
tested it only with oss apps). This does cost you some latency, but is
still generally lightyears ahead of artsd, esd and other such stuff.
Hope this helps!
Ico
1:10 p.m.
Forgot to add, that the main benefit of doing this is that then both
apps can share the same dsp resource, which is prolly what you were
aiming at (at least that was my assumption, since I remember vaguely you
mentioning artsd somewhere in there).
NB: there is also dmix and snoop alsa plugins that do the same thing,
but I've not had much luck running that with the apps that do not
natively support alsa, and even furthermore, some native alsa apps have
had issues with it (at least in my case).
Ico
-----Original Message-----
From: linux-audio-user-admin(a)music.columbia.edu
[mailto:linux-audio-user-
admin(a)music.columbia.edu] On Behalf Of Ivica Bukvic
Sent: Monday, April 14, 2003 10:33 AM
To: linux-audio-user(a)music.columbia.edu
Subject: RE: [linux-audio-user] ALSA device sharing?
> On Sun, 13 Apr 2003 20:22:34 -0400, Ivica Bukvic wrote / a écrit:
>
> > jacklaunch <appname> <flags...etc>
>
> Hi
>
> I'm so confused here: I was believing jack needed alsa to work. So
if
alsa
> is launched before, xmms and xine should run fine because they see
and
use
I've
alsa/oss emulation.
What am I missing here?
It does, but once the alsa is running, and jackd is running on top of
alsa, you can use jacklaunch hack to open up a new full-duplex
connection to jackd even with the apps that do not natively support
jack's framework (regardless whether it is oss or alsa, I think -- tested it only with oss apps). This does cost you some
latency, but is
still generally lightyears ahead of artsd, esd and other such stuff.
Hope this helps!
Ico
3 p.m.
On Mon, 14 Apr 2003 11:00:22 -0400
"Ivica Bukvic" <ico(a)fuse.net> wrote / a écrit:
Forgot to add, that the main benefit of doing this is
that then both
apps can share the same dsp resource, which is prolly what you were
aiming at (at least that was my assumption, since I remember vaguely you
mentioning artsd somewhere in there).
wasn't me. I don't use artsd :))
Anyway lots of thanks for the explanations. I will try to jackify my apps. until now, I
only launched jack when I wanted real-time midi+audio. So if the memory footprint is good,
I will use it by default.
Long life lau mailing-list !
Guy CLO~
#219055 http://counter.li.org
-------------------------------------
http://perso.wanadoo.fr/guy.clotilde/
-------------------------------------
11:40 p.m.
Mark Knecht wrote:
On Sun, 2003-04-13 at 15:17, Mikhail Ramendik wrote:
Actually it does but the apps should have native alsa support and it
needs to be fairly recent.
You can use the dmix plugin
I have used it with xmms.
There is documentation available on the .asoundrc page via the soundcard
matrix at alsa-project.org.
The jack plugin for xmms has been broken by recent jack cvs changes but
the author is planning to get it working again when he has time.
Also I second Ico's suggestion to use libjackasyn.
--
Patrick Shirkey - Boost Hardware Ltd.
Http://www.boosthardware.com
Http://www.djcj.org - The Linux Audio Users guide
========================================
Being on stage with the band in front of crowds shouting, "Get off! No!
We want normal music!", I think that was more like acting than anything
I've ever done.
Goldie, 8 Nov, 2002
The Scotsman
Hello!
Does alsa allow several programs to use one device, with soft mixing?
Not really. But Jack, which runs on top of Alsa, does. fluidsynth
supports JAck, as well as ither soft synths like amSynth and
ZynAddSubFx.
5:48 a.m.
Hallo,
Mikhail Ramendik hat gesagt: // Mikhail Ramendik wrote:
Does alsa allow several programs to use one device,
with soft mixing?
Yes, ALSA does support soft-mixing, but you have to use the ALSA
plugin devices made for that and you need at least alsa-0.9.1, I
guess. Try using "plug:dmix" instead of the default alsa device.
There's no excuse for running Arts or Esd anymore. ;)
ciao
--
Frank Barknecht _ ______footils.org__
7847
days inactive
7848
days old
linux-audio-user@lists.linuxaudio.org
9 comments
7 participants
participants (7)
-
Frank Barknecht -
Guy Clotilde -
Guy Daniel CLOTILDE
-
Ivica Bukvic -
Mark Knecht -
Mikhail Ramendik -
Patrick Shirkey