>>> The second scenario the vocal track and band will lose sync is the ACW (a single track function) has to have the first bar set before creating the Chord analysis and tempo map.

‘There’s an easy way to solve that. Assuming the master is on the audio track, and you’ve used that master to make your tempo map with ACW.
As youve pointed out, the starting point for bar 1 shifted for the audio track. And the other tracks didn’t get shifted,
The solution is to do either of these two things.

1. Delete the stem split tracks (bass.drums,guitars,vocals) and redo the stem split using the audio track (which is named mysong.wav on disk) as the audio source (assuming your bb song is called mysong.sgu). Then the stem tracks are perfectly aligned.
— or —-
2, if you’re planning to use the Audio chord wizard and sync things up, do that first by file-open or dragging the master to the audio track then use acw, and then stem split using the audio track as the source. (That gives the same result as point 1 above)

In a future patch we will add an option that auto-shifts all of the audio tracks, but until then either if these options should work to fix up any situation where the stem tracks are not aligned with the master track.

Have Fun!
Peter Gannon
PG Music Inc.