” It said that this worked but all places where I had set sound to zero the sound could still me heard”
Very strange. I do this a lot and never hear any audio. Was it a stereo track or dual mono (i.e. two two distinct channels on a single stereo track?)
“I suppose it might have been different if I had combined the tracks first.”
That’s a possibility. Once again, what was on the track?
” The current audio track is labeled as Microsoft Sound mapper.”
You choose your sound card in Vegas Preferences.
Options – Preferences – Audio Device.
Mine changes back to Microsoft sound mapper all on its own so I have to keep changing it back to what it’s supposed to be.