[mythtv] Separating CAPTUR and Capture in OSS
tpanning at vt.edu
Tue Mar 4 12:18:22 EST 2003
When I try to watch live TV with MythTV, I hear both the sound for the live
feed (what Myth is recording) and what's being played from the buffer. Here's
what I'm using:
* SB Live sound card (with OSS sound drivers)
* Hauppage WinTV card
* CVS version (today) of MythTv
* Debian unstable
I know that the Faq and the How-to mention this problem, but in both documents
the solution appears to be specific to alsa drivers. I understand what has to
be done with the mixer in order to get it to work, but I can't seem mute the
"CAPTUR source" without muting the "Capture mixer" (as they are referred to
in section 17.11 of the HOWTO).
After futzing with the mixer quite a bit, here's what I've been able to
1) There are 13 mixer controls: Volume, Pcm, Speaker, Line*, Microphone*, CD*,
IGain*, OGain, Line1*, Digital1, PhoneIn*, PhoneOut, and Video*. (an asterisk
(*) means that I can record this channel)
2) When I listen to mp3's using xmms, all of the controls can be muted except
for Pcm and OGain; I can set any channel to be the recording channel and it
does not affect playback. Moving the volume control in xmms moves the Pcm
slider. (I have no idea why I can muting the Volume control has no effect).
3) When I use xawtv, all of the controls can be muted except for IGain and
OGain; Line must be set to record (but the mute and volume setting have no
4) In MythTV, if I use the xawtv settings (see #3), then I hear the live feed
and not the playback. If I unmute the Pcm control, then I hear both the live
feed and the playback. If I then mute the IGain control (or turn it's volume
down to zero) then I hear just the playback for a few seconds until I hit the
point where IGain was muted, and then there is no sound.
Can anyone tell me what's going on here?
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