Hearing incorrect minor 2nd in MuseSounds Violin 1 playback

[seisfeldt]

Issue type

General playback bug

Description with steps to reproduce

1. Load the file "Incorrect playback - minor second.mscz"
2. Listen to the Violin 1 stave and hear the minor second chord on the D# 16th note.
3. Notice it only happens on D#5 (not octave 4 or 6).
4. Notice it doesn't happen on the Violins 2 (which I would have expected to be the same). You can even cut and paste the Violins 1 to the Violins 2 and it doesn't happen.
5. Notice it doesn't happen on a smooth crescendo.
6. If I use MS Basic sounds it (of course) doesn't happen.

Tried on Nightly build MuseScore-Studio-Nightly-253400405-4.6.4-8af129b-x86_64 and problem stills there
Using MuseSampler 0.104.1.923

Supporting files, videos and screenshots

Incorrect playback - minor second.zip

In which versions of MuseScore Studio is this issue present?

4.6.4 released and 12/5/2025 nightly

Regression

I was unable to check

Operating system

OS Name Microsoft Windows 11 Home Version 10.0.26200 Build 26200

Additional context

No response

Checklist

• This report follows the guidelines for reporting bugs and issues
• I have verified that this issue has not been logged before, by searching the issue tracker for similar issues
• I have attached all requested files and information to this report
• I have attempted to identify the root problem as concisely as possible, and have used minimal reproducible examples where possible

[MarcSabatella]

Issues with MuseSounds should be reported to that team directly, via the support link within MuseHub.

[seisfeldt]

Hello Marc, I wasn't aware of that. Thank you. The challenge is for end-users like myself (not-developers), how are we to know if the bug is in MuseScore or MuseSounds?

[MarcSabatella]

That's a good question, and it's not always 100% clear. But in general, if something works with MS Basic but not MuseSounds, that's a good clue right there. And that's what you are saying here.

[seisfeldt]

That makes sense. I will see if I log this issue on the MuseHub site. Thanks!