PhilippeTeuwen: Reverted edits by Etegohy (Talk) to last revision by PhilippeTeuwen

2010-11-24T20:35:55Z

Reverted edits by Etegohy (Talk) to last revision by PhilippeTeuwen

Can't load revision 6862

at 00:32, 24 November 2010

2010-11-24T00:32:01Z

Can't load revision 6704

PhilippeTeuwen: /* OSS compatibility */

2007-06-18T08:54:35Z

OSS compatibility

← Older revision		Revision as of 08:54, 18 June 2007
Line 55:		Line 55:

	More explanations about asound.conf [http://www.alsa-project.org/alsa-doc/doc-php/asoundrc.php here]		More explanations about asound.conf [http://www.alsa-project.org/alsa-doc/doc-php/asoundrc.php here]

			'''UPDATE''' I got the error ''can't create mcop directory'' at a point in time when trying to use mpg321.
			<br> Edit /etc/libao.conf and/or $HOME/.libao:
			default_driver=alsa09
			=>
			default_driver=alsa

	===esd===		===esd===

PhilippeTeuwen at 20:42, 17 November 2006

2006-11-17T20:42:15Z

New page

==Alsa==
apt-get install alsa-base alsa-utils ''[ gnome-alsamixer alsamixergui ]''
* alsamixer -> be sure main channels are active with some volume
* alsaconf
===OSS compatibility===
To check the OSS compatibility:
lsmod|grep oss -> snd_pcm_oss and snd_mixer_oss
play ...wav (apt-get install sox)
To allow mixing of wrapped OSS streams with ALSA:
<br>/etc/asound.conf:
pcm.asymed {
type asym
playback.pcm "dmix"
capture.pcm "dsnoop"
}
pcm.!default {
type plug
slave.pcm "asymed"
}
pcm.!dmix {
type dmix
ipc_key
ipc_key_add_uid yes
slave {
pcm "hw:0,0"
period_time 0
# Values required for mplayer:
period_size 1024
buffer_size 8196
format S16_LE
rate 48000
}
bindings {
0 0
1 1
}
}
pcm.!dsnoop {
type dsnoop
ipc_key
ipc_key_add_uid yes
slave {
pcm "hw:0,0"
period_time 0
period_size 1024
buffer_size 8196
format S16_LE
rate 48000
}
bindings {
0 0
0 1
}
}

More explanations about asound.conf [http://www.alsa-project.org/alsa-doc/doc-php/asoundrc.php here]

===esd===
To run esd in a compatible way:
apt-get install esound libesd-alsa0 esound-clients ''[ alsaplayer-esd mpg123-esd ]''
/etc/esound/esd.conf: put auto_spawn=1 '''only''' if you don't run esd at startup of gnome
[esd]
auto_spawn=1
spawn_options=-terminate -nobeeps -as 2
spawn_wait_ms=100
# default options are used in spawned and non-spawned mode
default_options=
Note that currently things go very wrong if a user enables the esd in his Gnome preferences, session hangs till esd is killed :-(

===aRts===
apt-get install arts akode

===All together===
To resume, we can achieve transparent mixing with all these together:
* ALSA
** aplay (or alsaplayer from alsaplayer-alsa)
** aoss play (wrapper for OSS programs -> ALSA)
* aRts (artsd)
** artsplay
** artsdsp play (wrapper for OSS programs -> aRts -> ALSA)
* esound (esd)
** esdplay
** esddsp play (wrapper for OSS programs -> esound -> ALSA)

Of course direct use of play with the snd-pcm-oss module cannot be mixed with those.

==Clients==

[http://gentoo-wiki.com/HOWTO_ALSA_sound_mixer_aka_dmix This page] might help finding its way with all the mixer daemons and configuring various applications (xmms, gaim, firefox etc) to use ALSA.

===gstreamer===
If you use gstreamer:
apt-get install gnome-media gstreamer0.8-alsa
gstreamer-properties -> select alsa
test
If you get hashed output, try selecting Custom with the following pipeline:
alsasink period-size=1024 buffer-size=4096
You can also directly test with:
gst-launch-0.8 filesrc location=/path/to/file.mp3 ! mad ! alsasink period-size=1024 buffer-size=4096

===Psi===
options -> sound -> player: aplay (instead of play)

===aRts===
kcontrol -> Sound -> Sound system -> Hardware -> use ALSA

==MIDI==

Note that intel8x0 doesn not have any midi support as most of the modern sound cards.

aplaymidi -l
* error -> that's because the kernel module is not loaded
* Midi Through Port-0 -> that's just passthrough, not usable
Use timidity instead:
* apt-get install timidity freepats
* play a midi file with timidity or launch timidity as midi plugin for ALSA:
timidity -iA
aplaymidi -p 128 ''file.mid''

==Todo==
*When launched by KDE, artsd gets the right parameters: /usr/bin/artsd -F 10 -S 4096 -a alsa -d -r 48000 -s 5 -m artsmessag
<br>But where are they defined?
*Get skype working with alsa

Debian Alsa - Revision history

PhilippeTeuwen: Reverted edits by Etegohy (Talk) to last revision by PhilippeTeuwen

at 00:32, 24 November 2010

PhilippeTeuwen: /* OSS compatibility */

PhilippeTeuwen at 20:42, 17 November 2006