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Alsa multi-channel defaults to duplication.
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KWhat
Guru
Guru


Joined: 04 Sep 2005
Posts: 551
Location: Los Angeles

PostPosted: Sun Jul 14, 2013 7:14 pm    Post subject: Alsa multi-channel defaults to duplication. Reply with quote

How do I prevent ALSA from duplicating all of my audio on all 8 channels of my sound card? I use to use a .asoundrc file however that seems to be causing all kinds of issues with chrome and html5 playback.

I have tired adding the following but I cant even play sound though this device.

Code:

pcm.!test71 {
        type route
        slave.pcm default
        slave.channels 6

        ttable.0.0      1       #Front Left 100%
        ttable.1.1      1       #Front Right 100%

        ttable.6.2      1     #Side Left 70%
        ttable.7.3      1     #Side Rgiht 70%

        ttable.2.2      1       #Rear Left 50%
        ttable.3.3      1       #Rear Rgiht 50%

        ttable.4.4      1       #Front Center 100%

        ttable.5.5      1       #LFE 100%
}
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PaulBredbury
Watchman
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Joined: 14 Jul 2005
Posts: 7310

PostPosted: Sun Jul 14, 2013 7:41 pm    Post subject: Re: Alsa multi-channel defaults to duplication. Reply with quote

KWhat wrote:
slave.pcm default

The default for "default" is stereo output. Can't force 6 channels into 2 channels, you'll just chop off everything but the first 2.

See config in my sig.
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