[mythtv] BUG: Alsa and surround sound
Michael J. Pedersen
michael.j.pedersen at verizon.net
Mon Jun 16 23:10:23 EDT 2003
On Mon, Jun 16, 2003 at 01:29:54PM -0700, John Hurliman wrote:
> Are you using SPDIF output (digital) for surround sound or running
> multiple 1/8" jacks (analog) to each of the speakers? All channels in
> SPDIF are controlled by the IEC958 Playback mixer in alsamixer, for
> analog 4.1 each channel has it's own mixer control and the PCM volume or
> Master volume that Mythtv controls only affects some, most likely the
> front channels. If you are using SPDIF I'd recommend adjusting your
> volume only through the external amplifier, in the analog case it's a
> bit tricker. Myth would have to probe the soundcard for surround
> channels, and adjust the volume of those too if found. It can be done,
> but I don't have the patch ;).
Ahhh, so that's the trick that's involved. Unfortunately, I'm using
analog 1/8" connectors, so it's something that's noticeably harder to
deal with. Just wish I had the time to do it myself, and do it
correctly. Hacking together something for me might be feasible, but it's
definitely not something that would ever be releaseable.
--
Michael J. Pedersen
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