With some quick hints from the kernel's USB audio maintainer, the appropriate quirk has been identified and patch sent:
https://mailman.alsa-project.org/pipermail/alsa-devel/2022-August/205214.html Waiting for upstream. In the meantime, this works (bluntly, for those who don't have multiple USB audio devices): # rmmod snd_usb_audio # modprobe snd_usb_audio vid=0x2522 pid=0x0007 quirk_flags=0x10000
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