Feature suggestion: syncing tracks with variable/unquantised tempos/BPMs

Hi

I don’t know if this is something that’s available in other DJ software, but it would be great to have in Mixxx some day.

Mixxx supports tracks with varying BPMs (and does a pretty great job of detecting them in my experience) but does not provide a means of automatically syncing them. Pressing the sync button when using a variable-tempo track just syncs the deck to whatever the track’s tempo is at that given instant; as soon as the tempo changes the two tracks will fall back out of sync.

Being able to lock two tracks with variable tempos in sync would be really great for creatively mixing tracks from genres that use live drummers rather than only electronic-derived music with fixed, quantised tempos.