M4 not compatible with Ubuntu 24.04

[cfirwin3]

I am finding that M4 will not playback properly in Ubuntu (Studio) 24.04 LTS. The sound stutters in oscillation upon note entry and playback. The play head moves slowly.
I have found that the Jack Branch PR build does work.

Perhaps there is an incompatibility with the default iterations of Pipewire in the latest Ubuntu release?

Other Alsa and Pulseaudio applications are working fine.

EDIT:
I found that Ubuntu 24.04 Pipewire (at least on Ubuntu Studio) is configured to a 48000 sample rate by default. Changing this to 44100 allows M4 to work. I don't think that M4 had a sample rate setting at the moment. It should.

[mproffitt]

My system upgraded to 24.04 this morning and I found I was facing this exact issue.

If you want to keep the higher sample-rate for your system overall and just target MuseScore, you can launch the AppImage with an environment variable for Pipewire that forces the sample-rate down:

PIPEWIRE_QUANTUM=256/44100 ./musescore

Neither PIPEWIRE_LATENCY or PIPEWIRE_RATE seemed to work for this but Quantum works perfectly.

https://github.com/PipeWire/pipewire/blob/master/README.md#usage

[cfirwin3]

Thanks!