Loading a VST3 instrument into MuseScore 4.0.0 (release) crashes the application every time

• Dec 22, 2022 - 00:04
Reported version
4.x-dev
Type
Functional
Frequency
Few
Severity
S3 - Major
Reproducibility
Always
Status
active
Regression
No
Workaround
No
Project

Trying to swap a Muse Basic sound for a VST3 plugin on MuseScore 4.0.0 release (Windows) seems to crash MuseScore when it tries to load the VST3 plugin.

Steps to reproduce:

  1. Load the attached .mscz on MuseScore 4.0.0 on Windows 10 (22H2, patched up to date)
  2. Open the mixer
  3. Change the Sound setting on the mixer's Piano fader to VST3 -> (any VST) (I've tried it with Steinberg's The Grand 3 and VSL's Vienna Synchon Pianos plugins, for example)
  4. Wait a while
  5. Application will crash without fail on my system

The .mscz attached is just a sample, it doesn't require this exact .mscz to crash the system.

Attachment Size
Untitled score.mscz 18.94 KB

Comments

Also, I have managed /sometimes/ to get VST3 plugin loading to work by loading Dexed VST3 plugin (which is quite a small plugin), then switching to a different one, e.g. BBC Symphony Orchestra. However The Grand 3 still crashes even via this route, as does Vienna Synchron Pianos, so whatever's happening may be dependent on the VST.