[Bug 252761] multichannel USB audio device reports only 2 channels via SNDCTL_AUDIOINFO

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=252761

--- Comment #7 from Sascha Folie <sascha.folie@safo.at> ---
(In reply to Hans Petter Selasky from comment #1)

I have a 20-in/18-out device and would like to use vchans.
So far I only managed to use the audio interface with virtual_oss.

Is anyone working on changing the limit from 8 to 127?

uaudio0 on uhub4
uaudio0: <Audiofuse Studio> on usbus1
uaudio0: Play[0]: 192000 Hz, 18 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 176400 Hz, 18 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 96000 Hz, 18 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 88200 Hz, 18 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 48000 Hz, 18 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 44100 Hz, 18 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 192000 Hz, 20 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 176400 Hz, 20 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 96000 Hz, 20 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 88200 Hz, 20 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 48000 Hz, 20 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 44100 Hz, 20 ch, 32-bit S-LE PCM format, 2x8ms buffer.
uaudio0: MIDI sequencer.
pcm4: <USB audio> on uaudio0

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