[mythtv-users] Double-audio. And yes, line in is muted and set to record.

[Jarod C. Wilson]

I'm having fun. I just moved my AVerTV Studio card into my main MythTV 
box, along side my PVR-250. I'm using an Audigy sound card (w/ALSA 
0.9.6), feeding my amp via the Audigy's digital coax output. The audio 
loopback cable for the AVerTV is now connected to the Audigy's line in. 
Everything is peachy in xawtv on the AVerTV card (xawtv -c 
/dev/video1), and everything is fine when I go into MythTV and start 
watching Live TV (using my first input, the PVR-250's tuner). Then the 
fun really begins.

Just for starters, after testing in xawtv, I did indeed set the capture 
source to line in and then mute it. Now I go back into MythTV, schedule 
up a recording (so it starts w/my first card, the PVR-250, no problem). 
While recording, I go into Live TV, which now uses the AVerTV card. 
Double audio, one version in time w/video, one a bit ahead. Fire up a 
terminal, start alsamixer, verified that line in is muted. Not good. 
Stop Live TV, audio continues. The line in is still on mute. Toggling 
it does nothing. Very annoying.

Methinks that because I'm using the digital coax output, feeding an 
outright DTS/Dolby Digital decoding amp, the card is doing nothing but 
pass-through (which is a good thing I wish to have continue), but 
pass-through also means it doesn't give a rat's ass what the capture or 
mute settings are for line in. Can anyone confirm that, and/or give me 
insight into a way around it?

In the mean time, I think I'll just simply re-enable the motherboard's 
onboard audio, and use the onboard line in port. Dual sound cards... 
There's something I have yet to try... Oh joy...

--Jarod

-- 
Jarod C. Wilson, RHCE

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MythTV, Red Hat Linux 9 & ATrpms documentation:
http://pvrhw.goldfish.org/tiki-page.php?pageName=rh9pvr250