Previous time signatures affecting later beaming

Postoli commented 6 months ago

Issue type

Engraving bug (incorrect score rendering)

Bug description

In this score, I have a 15/16 bar, followed by a 7/8 bar. Before this point, 4/4 was beamed as 4+4. However following this point, all beams of 4 (or 6) are split into two, EVEN THOUGH the Time Signature properties for future time signatures (4/4, 6/4) outline beams should be grouped (i.e. 4+4, 6+6, not 2+2+2+2 etc.). BUT, strangely, when a bar is placed between the 15/16 and 7/8, this resolves the issue.

Steps to reproduce

Insert a 15/16 bar
Insert a 7/8 bar IMMEDIATELY after
Insert a 4/4 some place after
Insert 8 quavers in the 4/4 bar. Note how they are beamed in twos, even though the Time Sig properties outlines it should be grouped as fours.

Screenshots/Screen recordings

MuseScore Version

4.2.1

Regression

I don't know

Operating system

macOS Sonoma

Additional context

No response

DaddyLudwig commented 6 months ago

Seems somewhat related to this issue I encountered months ago with a Mozart cadenza, like they probably have the same root cause. Not a nominal time signature change in my case, but a joining of measures to make a cadenza that is 57/16 in length. Also causing eighths in 4/4 to be split into groups of 2 when it shouldn't be.

https://github.com/musescore/MuseScore/issues/17905

And I encountered similar beaming issues in 4/4 when making a 1/32 pickup via Measure Properties at the start of a Beethoven cello sonata as well. 3 different causes, same result, there's gotta be something at the root of all this.

Earlgrey99 commented 5 months ago

Hi,

I'm a university student looking to contribute to MuseScore for a class project. I'd like to take a look at this bug.

musescore / MuseScore