[alsa-devel] Question about dmix?

cee1 fykcee1 at gmail.com
Sun Mar 21 02:58:12 CET 2010

2010/3/20 Colin Guthrie <gmane at colin.guthr.ie>:
> 'Twas brillig, and cee1 at 20/03/10 14:05 did gyre and gimble:
>> Hi all,
>> I know alsa support userspace software multi-playback by dmix plugin.
>> How does it realize? I expected a daemon accepting multi-streams which
>> then mixes these streams to a single one -- it seems not the case.
> I believe an older version of dmix used to act like a daemon, but the
> current version no longer does this and instead uses some magic spells
> that I don't even being to know about.

My soundcard is driven by an experimental alsa driver, it seems always
underrun the buffer and causes bad quality in playback. Disable dmix
will improve playback quality a little. I'm curious about what does
dmix do internally.


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