audio workaround needed

jerseybri · Post by **jerseybri** » Wed Jul 13, 2005 2:42 pm

I have a strange question. I have a DVD that has audio only on the RIGHT channel. My guess is that the person who originally created the DVD had the inputs switched, so the mono channel (LEFT) output was put into the RIGHT input. In any case, I don't have the original source, but only the DVD with RIGHT channel.

How would I get this audio onto the left channel? I have a mono set up (in a retail establishment) and this DVD plays with no sound, since the LEFT channel is empty.

Any suggestions would be appreciated.

Trevor Andrew · Post by **Trevor Andrew** » Wed Jul 13, 2005 3:39 pm

Hi

If your video has both channels but with one muted ie stereo then you may have to change the format to mono.
This will remove one channel hopefully the muted one. Render the video to mono, then render back to stereo, will copy the sound to stereo, copying the left channel to the right.
Read :- http://www.stephen-wray.co.uk/lata/vs/all.htm

Unfortunately you say that the sound channel is the right one.

Try using the split audio option then re rendering.

Splitting the audio mutes the sound in the main video timeline and puts a copy of the audio clip in the sound track, rendering may copy the audio to both channels.

Hope this Helps

DVDDoug · Post by **DVDDoug** » Thu Jul 14, 2005 1:06 am

I think you need a hardware solution.

I assume that sometimes you play stereo (or even surround) DVDs. You need to combine the left and right together into one mono signal. (The DVD player will automatically mix-down 5.1 surround to 2-channels for it's stereo outputs.)

The most fool-proof way to do that is with a mixer. Any cheap mixer will work, as long as it has two line inputs and one line output.

If it's a stereo mixer, just leave one channel unconnected...
DVD left output -> Mixer channel one right input
DVD right output -> Mixer channel two right input
Mixer right output -> audio system input

If the DVD player is hooked-up to your store's background music / paging system, then perhaps you already have mixer (perhaps a mixer/amplifier combo). In that case, you might have an unused mixer input than you can connect the right channel to.

Radio shack sells a stereo-to-mono cable, which I assume has resistors to safely combine two outputs.

I've actually used a regular Y-adapter to connect to a mono TV, but this is a bad idea because it shorts the left & right preamp outputs together which could blow the electronics!

gordon_fan_24 · Post by **gordon_fan_24** » Thu Jul 14, 2005 1:31 am

VS9 was an option to duplicate the left or right channel in the audio section, the tab below the timeline view mode, it looks like a speaker. I am pretty sure this will diplicate the right channel onto the left channel so both channels are the same. I don't know if VS8 has this feature.

Trevor Andrew · Post by **Trevor Andrew** » Thu Jul 14, 2005 4:28 pm

VS option to duplicate channels does not do what it says.

I think it should be called ‘mute channel’ cos that’s what it does.

So if you have stereo with background sound on the right and narration on the left channel, you can mute one of the channels.

I can see this function having its uses.
But it does not duplicate one channel to the other.

Ok I was a bit premature there.

After duplicating a channel, you are left with one sound channel.

If you now render to a new file, provided stereo is selected as an audio properties, both channels will have the same content.

Trevor