I have a 30 minute video of our band in concert in MP4 format, recorded at 29.97 fps. The sound quality was not great, so I'm trying to replace the audio with a WAV file of the show recorded from the PA system. I got the two waveforms sync'ed on the timeline from the beginning of the show and then muted the original audio track. Sounds great. However, after a few minutes I can see the two waveforms are now slightly out of sync. By the end of the show, they're really out of whack.

I thought about cutting the WAV file between every song and manually re-sync'ing it, but that's pretty tedious and it's still not perfect at the end of the song. Any better way to do this?

Could the issue be the 29.97 fps? I have a "time-stretch" feature in my DAW software so I could change the WAV file before bringing it into PD, but I'm not sure how to calculate the amount I'd need to stretch the audio file. I'm guessing it would be a very small amount.

Thanks in advance.

~~JB~~