musescore / musescore/MuseScore
No playback when loading a project that has VST3
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@zacjansheski is already working on this.
Since Jul 25, 2025.
VST
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Description
Issue type
VST bug
Description with steps to reproduce
- Save your project with a VST3 instrument; your project should still work as expected as long as you don't close MuseScore.
- Close MuseScore and reload that project.
- After MuseScore has finished loading audio samples, you should notice the playback functionality is unresponsive; checking the Mixer shows many if not all tracks being blank, and many tracks don't even load.
Supporting files, videos and screenshots
What is the latest version of MuseScore Studio where this issue is present?
MuseScore Studio version (64-bit): 4.5.2-251141402, revision: github-musescore-musescore-ac9d3bc
Regression
I was unable to check
Operating system
Windows 10 21H2
Additional context
The specific VST3 instrument I'd used is XLN Audio Addictive Keys to replace Muse Sounds Grand Piano because I like its sound more. I haven't tested other VST3 instruments yet.
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
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Assessment
This issue has not been assessed yet.