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[MU4 Issue] Opening MU3 Scores with Offset Velocity Type Notes
Describe the bug Opening a score made in MuseScore 3 that use notes with Velocity Type of Offset do not translate correctly in MuseScore 4.
To Reproduce Steps to reproduce the behavior:
- Create a score in MuseScore 3.
- Create a note and change its Velocity Type.
- Save score and open it in MuseScore 4.
Expected behavior Velocity should be recalculated from Offset to User rather than using the raw Offset value.
Screenshots
Platform information
- OS: Windows
Additional context This was mainly noticeable with negative values, but I think positive values also yield the same issue.
The velocity options in MS3 are a bit of a work in progress, unfortunately. There will be a much better system in a future update, but currently it's a bit broken. Now you have one control, which basically is an offset control, but pretends to be an absolute control:
- 64 means "use the default"
- 64 + something means "use the default plus something" (i.e. 70 would be 6 louder than the default)
- 64 - something means "use the default minus something" (i.e. 50 would be 14 louder than the default)
The reason I had opted to use Offset rather than User in MuseScore 3 is because with Offset, I still got the influence from dynamics. Like 0 in Offset was different when the dynamic is pianissimo vs forte.
@cbjeukendrup but independently of that, it's just a bug that MU3 files don't translate velocity to be based on 64 instead of 0. On reading of a MU3 file, all "offset" velocities should have 64 added (and then capped at 127) so that they sound the same in MU3. This is going to negatively impact a lot of scores.
Fixing up "user" velocity would be trickier - would need to find the current dynamic and rebase according to it. not worth it as far as I'm concerned. But fixing offset would be important, and simple - add 64, min vs 127.
This is already reported as https://github.com/musescore/MuseScore/issues/14768
Was Offset additive or multiplicative? I thought it was multiplicative, as in -100 = completely silent
Offset was definitely additive. -100 is indeed completely silent if the dynamic marking was 100 or less, because then subtracting 100 leaves you at zero (there are no negative velocities). But if the velocity was 101-127, then an offset of -100 would still be audible, if very quiet.
