[LAU] Tascam US-122: No playback channels

Hi! I tried to make a Tascam US-122 "Classic" work with my Debian-testing-powered Thinkpad T410. I followed the instructions on https://alsa.opensrc.org/Tascam_US-122#Tascam_US-122_on_Debian_and_Ubuntu as far as I could (alsa-base is not in Debian, anymore) but once I tried to use the device for playback in pulseaudio I realized there was no sink created. Pulseaudio offers the possibility to use the TASCAM with "multiple input" besides "stereo input" (although I thought it's a stereo in/out device) but there was no option to use it as an output. I tried to use jackd to double-check the missing output, but it failed to startup. Reason: "cannot configure playback channel" The whole log (of the important part): "jackdmp comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details JACK server starting in realtime mode with priority 10 self-connect-mode is "Don't restrict self connect requests" audio_reservation_init Acquire audio card Audio1 creating alsa driver ... hw:USX2Y|hw:USX2Y|256|3|44100|0|0|nomon|swmeter|soft-mode|32bit configuring for 44100Hz, period = 256 frames (5.8 ms), buffer = 3 periods ALSA: final selected sample format for capture: 24bit little-endian in 3bytes format ALSA: use 3 periods for capture ALSA: final selected sample format for playback: 24bit little-endian in 3bytes format ALSA: use 3 periods for playback ALSA: cannot set hardware parameters for playback ALSA: cannot configure playback channel Released audio card Audio1 audio_reservation_finish Cannot initialize driver JackServer::Open failed with -1 Failed to open server" Any ideas? Greets! Mitsch