[MU4 Issue] MuseSounds cannot handle large scores

[metasekk]

Describe the bug When a score becomes large (high number of pages whatever the content of the score is - can be empty - or medium number of pages with a lot of notes), Muse Sounds stop working and become permanently silent from a certain point onwards.

To Reproduce Steps to reproduce the behavior:

1. Create a new empty score using MuseSounds in at least one staff.
2. Add more than 1000 bars (2*999 for example).
3. Go to the end of the score, and add notes on the staves using MuseSounds.
4. Hear no sound. Besides, there exists a well-defined bar before which MuseSounds works perfectly and after which it is permanently turned off.

Expected behavior During playback, any staff using MuseSounds should play wherever it is located in the score, regardless of the length and content of the score.

Screenshots I provide a short video.

Platform information

• OS: Windows 10 Version 22H2, 64 bits, x64-based processor
• Tested and verified on: MuseScore Release version (64-bit): 4.0.0-223472200 with MuseSampler v.0.3.2 ; MuseScoreNightly-230080305-master-3602349-x86_64 with MuseSampler v.0.3.2

Additional context I believe it is most likely to be correlated with https://github.com/musescore/MuseScore/issues/15094. If this is established, then the moment when MuseSounds is turned off depends at least on:

• The number of notes of the score;
• The number and values of tempo markings;

Consequently, in empty scores, MuseSounds can work up to more than 1000 bars (1075 in the case of the video I provide) but when the score contains stuff, the bug can happen at much lower bars (bar 367 in the score provided in https://github.com/musescore/MuseScore/issues/15094). This variability makes this problem highly disabling.

[cbjeukendrup]

This also came up a while ago in https://musescore.org/en/node/340504. I shared it with the Muse Sounds team, and @iamtesch told me that they basically already have a fix, but this will require a change in MuseScore itself too, so will be released together with the next MuseScore update.

[DmitryArefiev]

Fixed in #16464 but still doesn't work because of an old version of MuseSampler.

Should be rechecked when v0.4 is released

[DmitryArefiev]

Tested on 4.1 RC build, Win10, MuseSounds, Muse Sampler library is 0.4.0 - FIXED