I recently tried to import an audio file and sync it up to existing chord chart where all tracks were done in a DAW by my friend with Synth V for vocals, and I was using ACW to try to detect and sync up the downbeats of the chord changes.
I gave up after about 1/2 an hour of trying to get the first beat on the audio file to line up with the first chord change.


Studio One (latest version), Win 11 23H2 , i9 -10940X 3.3 GHz, 32GB Mem, a 4K 40" monitor, PreSonus Studio Live III Console as interface/controller. secondarily test on Reaper, Cakewalk, and S1 on Surface Pro 3 Win 10 (latest versions).