I played a gig recently and I have two audio sources: one 192 kbps MP3 file from an H2N Zoom sitting near me (I'm the drummer), and another from the sound engineer at the venue which is a mix of the board mix plus a room mic (I have a WAV version and a 320 kbps MP3 version).
I synchronized them based on four drum stick clicks at the start of the first song, and that song sounds well-synchronized. However, there is a drift - if I go to the end of the now-supposedly-synchronized tracks, the track I got from the sound engineer is 160 ms too late compared to my H2N track (drifted over the course of about 47 minutes).
- Why is there this drift between the two audio sources?
- How do I fix it?
So far my only option seems to be to re-synchronize each song separately and hope the ~17 ms drift per song won't be too noticeable.