[alsa-devel] Question about surround default pin config
david.henningsson at canonical.com
Thu Aug 9 14:51:40 CEST 2012
Sometimes it's better to just ask than getting confused trying to figure
it out yourself.
When you have 2 stereo pairs of line-out or speaker, they are meant as
either 4.0 (front left, front right, rear left, rear right), and
sometimes they are meant as 2.1 (front left, front right, unused, lfe).
We should support both variations, I assume.
What is really the way to write my pin fixups to specify either 4.0 or
2.1? Are there any de-facto standards?
If I look at e g check_output_sfx (in hda_auto_parser.c), it looks like
it would be impossible to have 2.1, i e, impossible to have LFE without
also having rear left and rear right. But I might be missing something?
David Henningsson, Canonical Ltd.
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