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jackaudio / jack2

jack2 codebase
GNU General Public License v2.0
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MIDI on Windows is broken #892

Closed dunkfordyce closed 2 years ago

dunkfordyce commented 2 years ago

I am using jackd -S -X winmme on windows. I have no external MIDI devices. In messages I get the following error

JackWinMMEDriver::Open - while creating output port: Undefined external error. | winmme, system_midi, out

Googling this error suggests the port is in use. I have checked all my services and nothing should be using MIDI. This maybe correct as I think jack does not actually do its own virtual midi routing?

I have tried virtual midi devices such as loopbe and loopMIDI. loopbe does not work at all. loopMidi shows some virtual devices but does then not work for my use case: using SuperCollider when I create a midi output it does not show up in jackctrl graph editor or in Carla's external devices display. If I do not use jack the midi output from SuperCollider is shown in Carla.

If its relevant I am also using ASIO4ALL driver.

dunkfordyce commented 2 years ago

Looking at issue #558 and the code in https://github.com/jackaudio/jack2/blob/852ba2b8ebc944865e75d8eb5d4550d408772f3b/windows/winmme/JackWinMMEDriver.cpp it seems like jack does not monitor port changes and only creates them on startup which could explain the problems..?

dunkfordyce commented 2 years ago

I got this working - I think I was confused.

pcmkr929 commented 2 months ago

@dunkfordyce Would you also have the goodwill to tell us how you solved it?