[LAU] multiple applications using the soundcard with alsa

[Ismael Valladolid Torres]

Atte Andre Jensen escribe:
> A question came up on my local (non-audio) lau: Is it possible to 
> automatically mix audio from different apps (desktop apps like firefox, 
> flash, skype, system sounds, stuff like that) with alsa. I tend to say 
> "yes" based on things I think I head mentioned here, but couldn't find 
> the posts, so I have to ask again. If possible, what does it take?
> 

As far as applications use the "default" device, the following
.asoundrc may work for you. it works lovely for me.

Cordially, Ismael
-- 
Ismael Valladolid Torres      http://www.facebook.com/ivalladt
  <ivalladt at gmail.com>        http://twitter.com/ivalladt

t. 0034912519850 m. 0034609884094 (Yoigo)
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# .asoundrc - Personal configuration file for ALSA

# Copyright (C) 2009 Ismael Valladolid Torres <ivalladt at gmail.com>

# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.

# See the file COPYING for details.

pcm.ossmix {
    type dmix
    ipc_key 1021		# must be unique!
    ipc_perm 0660   		# sound for everybody (at least in your group)
    #ipc_key_add_uid false	# let multiple users share
    slave {
        pcm "hw:0,0"
        period_time 0
        period_size 1024	# must be power of 2
        buffer_size 8192	# dito
        #format "S32_LE"
        #periods 128		# dito
        #rate 8000		# with rate 8000 you *will* hear
    }				# if ossmix is used :)

    # bindings are cool. This says, that only the first
    # two channels are to be used by dmix, which is enough for
    # (most) oss apps and also lets multichannel chios work 
    # much faster:
    bindings {
        0 0   # from 0 => to 0
        1 1   # from 1 => to 1
    }
}

# Redirect to ossmix
pcm.!default {
    type plug
    slave.pcm "ossmix"     # use our new PCM here
}

# Redirect to ossmix
pcm.dsp {
    type plug
    slave.pcm "ossmix"     # use our new PCM here
}

# mixer like above
ctl.mixer {
    type hw
    card 0
}

# Local Variables:
# mode: conf
# End:
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