Jack stops when I press notes on my midi keyboard? (I don't even use it for midi)

[gsirvine]

Describe the bug

Jack stops when I press notes on my midi keyboard? (I don't even use jack for midi nor do I see any midi settings in jack)

Environment

• JACK Version:
• Operating System: Windows 10
• Installation: downloaded from the website https://jackaudio.org/downloads/

Steps To Reproduce

Press note on midi keyboard > jack stops (doesn't crash just stops)

Video of the steps.
https://github.com/user-attachments/assets/c7c8545a-5bfb-4430-9009-db91edbbd395

Message output

18:29:50.845 JACK connection graph change.
Allocate: named semaphore already exist name = jack_pipe.default_qjackctl
18:30:34.690 Shutdown notification.
18:30:34.695 Client deactivated.
18:30:34.705 JACK is being forced...
18:30:34.906 JACK was stopped

Jack setup:
I have jack set to my asio driver. I don't even understand why it reacts to midi. I don't want it to.

Expected vs. actual behavior

It keeps running when i press midi notes would be my expected behavior. It makes no sense because I see no settings that relate to midi. I wish I could just turn everything midi related off for jack.

[gsirvine]

Okay I unplugged my midi controller from the direct USB port connection and plugged it's usb cable into a midi interface that has it's own usb host port on it. This somehow works around the issue.

There is some sort of interaction between direct midi over USB and jack or it is specifically an issue with this midi controller (the roli seaboard).

Either way this works around the issue. (Sorta)

Downside to this is the whole reason for having an MPE controller is that you can use MPE. (Multi timbral polyphonic expression or Midi polyphonic expression).

By going through this controller I don't know if it can pass MPE. Just plain old midi notes. Sucks kind of. I will play around with settings a bit and see if I can get it to pass MPE.

What could be causing an interaction for this? Direct USB connection causing jack to turn off on midi notes being pressed?

[dimm-soft]

I also encountered this problem. So far I have managed to simply disable MIDI by deleting the launch line argument -X winmme

[falkTX]

This was already fixed in latest develop branch, but I still need to make a new release with the fix.
If you want test a new build that has the fix you can use the latest available build
https://github.com/jackaudio/jack2/actions/runs/9828548183/artifacts/1681291121