I could try take away the pi52 DAC… and try connecting only the Slim midi hat, to see
if thtt makes any difference… let me try this now…
I connected my jetli usb sinilink soundcsrd but it is not bein grecognised. It is recognised automatically in Pi os. No more pi52 hubrid nvme da. Still no midi in. I set audio to dummy.
this is the siniilink usb card
https://forums.raspberrypi.com/viewtopic.php?t=387665