[mythtvnz] Various MythTV issues

[Stephen Worthington]

On Mon, 30 Jul 2007 22:53:21 +1200, you wrote:

>
>Hi all,
>
>I'm slowly finding the time to get our MythTV box up and running.
>
>The biggest problem at the moment is I cannot get the audio working when=
=20
>watching tv. Current hardware is a Shuttle ST61G4 and a Pinnacle PCTV=20
>Pro tuner card. This tuner has an audio out connection that I have=20
>patched back into the line input of the Shuttle but so far cannot get=20
>the audio through MythTV.
>
>I have verified that I can get audio out of the Shuttle using MythMusic=20
>and that works fine. Also, I have plugged headphones directly into the=20
>tuner card and the audio is there. I've also tried adjusting the volume=20
>levels using aumixer but so far no go.
>
>Currently in the myth settings the audio is configured to come from=20
>/dev/dsp.
>
>Another thing, when listening to the audio directly from the card, it is=
=20
>  badly out of sync with the picture. I'm assuming this is because of=20
>the buffering MythTV is doing and hoping that when I can get the audio=20
>sorted, this won't be a problem.
>
>Would appreciate any ideas that people have.
>
>Thanks
>Dave

Audio sync problems are often caused by LCD or plasma TVs.  These do
considerable computation before displaying a frame, and that takes
time.  My Panasonic TX-32LX70A seems to take about 120 ms.  When the
sound is coming from the TV speakers, the TV delays the sound to
match, but if it is coming from the MythTV audio output, you have to
adjust the delay to match the TV.