Controlling MiniDexed via USB Midi & print MIDI notes to HDMI

[Tom-Gard]

Hello, I hope someone from the community can help with this query. I am currently running MiniDexed on a Raspberry Pi 4 headless. My intention is to run the device without an LCD screen and encoder and to control the device over MIDI via USB. I am currently taking audio out from the headphone out on the Pi.

I've been able to set up MiniDexed and am getting sounds out playing with my MIDI keyboard. I've tried to figure out how to change patches via MIDI, but so far, I haven't had any luck.

I understand that within the library, there is documentation to allow incoming MIDI Program Change messages to control the patches within a sound bank; however, my MIDI keyboard (a Native Instruments Kontrol M32), doesn't have built-in functionality to output Program Change Messages, just MIDI and CC. The only functionality I really need is to control patches via incoming CC messages. I'm not interested in changing sound banks or performances, as the 127 patches within a sound bank will be enough.

I've read this discussion: #496, but didn't have any luck with the changes suggested.

In order to get some visibility on the incoming MIDI messages, I've tried setting MIDIDumpEnabled in minidexed.ini to 1 to print incoming MIDI messages to my HDMI output, but I'm not getting anything. I receive messages when plugging in and unplugging the device, and I know it is receiving incoming MIDI as I am receiving audio out from the device, but I can't see what packets are being received.

I've made other alterations to minidexed.ini within the MIDI button navigation section (changing the notes for navigating the menu), which are reflected in the messages printed when starting up the device, so I am confident that the changes have been made locally on the Pi; although, I also haven't had any success with the MIDI button navigation.

I'd be very grateful if someone could has a suggestion about how to allow printing incoming MIDI notes to the HDMI and control patches within a .syx bank via MIDI? Thank you.

[penfold42]

There's something weird going on with logging in minidexed.
Itt seems that any usb midi initiated code paths magically disable logging.

For example I've been adding MidiThru2 because i wanted bi directional forwarding.
Applemidi -> usb would happily log my own debug messages and the midi dump you're trying
usb -> Applemidi would show neither of these

[penfold42]

I think I've found the "weird going on".... by reading the the doco

Please note that in MiniDexed, log messages will not be displayed from IRQ_LEVEL by default, because it uses the REALTIME option. For debugging purpose you may have to disable this option in build.sh before build if you want to see messages from IRQ handlers.

MIDIDumpEnabled uses the logging subsystem to write its output.
If you can use 5 pin DIN serial midi or Apple rtp-midi the mididumps will work.