track analyzed and beatgrid re-created at every load

[David Nadasi]

mixxx 2.3.1, Debian 11, x86_64

Since 2.3.1, rhythm analysis is done each time I load a track on a deck.
This is very annoying because I have "assume constant tempo" unchecked because I use a lot of non straight tempo tracks.

With those settings :

- Queen Mary analyzer selected
- Assume constant tempo unchecked
- Re-analyze beats when settings change (...)

The behavior in 2.2 was :

1. Fist load of a track
2. Beat and key analysis
3. Manual tweak of beatgrid if needed
4. Manual check of constant tempo property if needed on track > right-click > properties > BPM
5. No analysis on second track load and beatgrid adjustments preserved.

Now in 2.3.1, the behaviour is :

1. Fist load of a track
2. Beat and key analysis
3. Manual tweak of beatgrid if needed
4. Manual check of constant tempo property if needed on track > right-click > properties > BPM
5. Beat and key analysis at every load and beatgrid adjustments lost, track assumed as non-constant BPM.

I realized this bug during a set, a track I had previously marked as constant BPM was reassumed as non-constant BPM, with a lot of BPM variation in the beatgrid. As BPM sync was enabled on the two decks, the tempo slider started to move a lot to "stay synced" to previous track. Horrible result as you can guess.

As a workaround I have checked "Assume constant tempo" in general settings. The problem is when this is enabled, I can't uncheck it on track properties. I have to uncheck it in general settings, uncheck it in the track properties, then re-check it in general properties. This is odd.

Maybe I should report a bug for this also ?

[Swiftb0y (swiftb0y)]

Mixxx now uses GitHub for bug tracking. This bug has been migrated to:
https://github.com/mixxxdj/mixxx/issues/10602