No sound on a track? Try this.

TorS wrote on 9/26/2003, 3:58 AM
I've just spent a couple of days (and a stack of blank DVDS) solving this mystery, so I thought I'd share the solution.
I burned a DVD with several tracks. On one of them the audio did not work. It was not totally absent; when I turned the volume very loud I could "sense" it. But on preview in DVDA it worked fine.
Well, I had a phase problem. This was a mono soundtrack being treated as stereo. When the DVD track played on my (mono) TV set, the two channels canceled each other out. So I went back to Vegas, rightclicked the audio, selected Channels and Left only, re-rendered again. Burned again. All well.
So it's a good test: Open Channels, select Combine. If the sound disappears your phase is wrong.
Tor

Comments

johnmeyer wrote on 9/26/2003, 10:48 AM
Very interesting discovery. Purposely setting the channels out of phase is a trick used to remove vocals from music, since they are often placed equally on both channels.

The question is, did you ever figure out how the two channels came to be recorded out of phase?
TorS wrote on 9/26/2003, 11:09 AM
Don't know for sure why it happened. I may have tried to simulate stereo one time. But I would have done that to several videos (from old analogue tapes), but only this one gave me phase trouble.
Tor
Jsnkc wrote on 9/26/2003, 1:39 PM
"I've just spent a couple of days (and a stack of blank DVDS)"

Ever heard of DVD-RW's they are great for testing purposes and solving lifes little mysteries.
wobblyboy wrote on 9/26/2003, 11:06 PM
You know there is an invert track phase icon on the audio tracks in Vegas.
TorS wrote on 9/27/2003, 1:09 PM
Well, I didn't know - must be new in 4. Anyway, it seems to work on the whole track, so it wouldn't have solved my problem, inverting both channels.
Tor