[alsa-devel] ALSA mixer query
Hello all,
I am rendering audio to a PCM playback device (hw:0,0). I also need to render the same audio data to second PCM playback device (hw:0,1).
1) Can i use ALSA mixer APIs so that i give PCM audio data to 1 playback device or some common interface, but the PCM audio data is rendered to both devices (hw:0,0 and hw:0,1)
Regards Irfan
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Irfan Shaikh wrote:
I am rendering audio to a PCM playback device (hw:0,0). I also need to render the same audio data to second PCM playback device (hw:0,1).
- Can i use ALSA mixer APIs so that i give PCM audio data to 1 playback device or some common interface, but the PCM audio data is rendered to both devices (hw:0,0 and hw:0,1)
The mixer API ist just an interface to the hardware, so this would depend on the hardware's capabilities.
However, you could use the plugin mechanism to create a virtual PCM device that routes its data to two actual devices. See http://www.alsa-project.org/alsa-doc/alsa-lib/pcm_plugins.html#pcm_plugins_multi.
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Regards, Clemens
participants (2)
-
Clemens Ladisch -
Irfan Shaikh