From: Clemens Ladisch <clemens@ladisch.de>
To: Pavel Fedin <sonic.amiga@gmail.com>
Cc: alsa-devel@alsa-project.org
Subject: Re: Independent usage of two channels
Date: Thu, 22 Jan 2009 12:42:38 +0100 [thread overview]
Message-ID: <49785BAE.6090402@ladisch.de> (raw)
In-Reply-To: <187c6cc60901220316i65a1558bm4b7c503db062a01e@mail.gmail.com>
Pavel Fedin wrote:
> Is it possible to use two channels of a sound card as two independent
> devices for PCM playback?
The sound card is probably not able to handle two independent mono
streams, but it is possible to use alsa-lib's software plugins to
emulate two devices on top of the real one.
Put this into your ~/.asoundrc or into /etc/asound.conf:
pcm_slave.stereo_slave {
pcm "hw:0" # or "hw:1" for the second card ...
channels 2
}
pcm.left {
type plug
slave.pcm {
type dshare
slave stereo_slave
}
bindings [ 0 ]
}
pcm.right {
type plug
slave.pcm { type dshare slave stereo_slave }
bindings [ 1 ]
}
Then use device names "left" and "right" instead of "default".
HTH
Clemens
prev parent reply other threads:[~2009-01-22 11:42 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-22 11:16 Independent usage of two channels Pavel Fedin
2009-01-22 11:42 ` Clemens Ladisch [this message]
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