[LAU] MIDI-controller treated as audio device

Hi! Installed a new kernel on my Debian Testing machine with kxstudio-"extension" :~$ uname -a Linux mmmaschine 5.9.0-4-rt-amd64 #1 SMP PREEMPT_RT Debian 5.9.11-1 (2020-11-27) x86_64 GNU/Linux and had a new problem that jack couldn't launched - which bever had been a problem, so far. Dived into journalctl -f and stumbled upon Dez 04 11:18:17 machine pulseaudio[1852]: E: [pulseaudio] module-alsa-card.c: Failed to find a working profile. Dez 04 11:18:17 machine pulseaudio[1852]: E: [pulseaudio] module.c: Failed to load module "module-alsa-card" (argument: "device_id="3" name="usb-KORG_INC._KONTROL49-00" card_name="alsa_card.usb-KORG_INC._KONTROL49-00" namereg_fail=false tsched=yes fixed_latency_range=no ignore_dB=no deferred_volume=yes use_ucm=yes avoid_resampling=no card_properties="module-udev-detect.discovered=1""): initialization failed. Knowing, that the Korg has no audio-abilities, I checked :~$ cat /proc/asound/cards  0 [PCH            ]: HDA-Intel - HDA Intel PCH                       HDA Intel PCH at 0x4001110000 irq 134  1 [Loopback       ]: Loopback - Loopback                       Loopback 1  2 [DSP            ]: H-DSP - Hammerfall DSP                       RME Hammerfall HDSP 9652 at 0xa0100000, irq 17  3 [KONTROL49      ]: USB-Audio - KONTROL49                       KORG INC. KONTROL49 at usb-0000:00:14.0-2, full speed Unplugging the Korg Kontrol49 made it possible to launch jackd, again. My questions: How can I force my system not to handle the Korg as an audio but a MIDI device? Is this something happening on kernel level, so *someone*™ has to fix stuff here? Greets! Mitsch