[mythtv-users] Volume control not working properly

[Sasha Z]

I have an onboard nforce2 MCP-T chip, but I'm using the analog out. I
don't have a receiver, nor digital speakers. Oh well.

Anyway, I have mythtv set up to use mixed-analog, as defined in the
mythtv.info sound article. I'm using that asound.conf

http://www.mythtv.info/moin.cgi/DigitalSoundHowTo

Anyway, mythtv controls the master volume control, with pcm pegged at
100%. It almost works ok. The problem is that when volume is at 0%, I
still hear sound out of the speakers, albeit quietly.

The other problem is with mythvideo. I'm trying to use mplayer to view
my videos, but I can't control the volume properly. Here's my mplayer
line:

mplayer -fs -zoom -quiet -vo xv -ao alsa -mixer-channel Master,0 -channels 6 %s

When I adjust the volume in mplayer, I can watch the master bar move
in alsamixer, but there is zero change in volume. The power to the
speakers always stays exactly the same. 0% is as loud as 100%. I don't
understand why the bar moves, but there is no change in actual volume.

I don't use the pcm mixer because that does not change the center
volume - the speech in movies, which is the most critical thing to be
able to turn up.