Plan 9 from Bell Labs’s /usr/web/sources/patch/applied/usbaudio-imic/files
/sys/src/cmd/usb/audio/audiosub.c audiosub.c /sys/src/cmd/usb/audio/usbaudioctl.c usbaudioctl.c /sys/src/cmd/usb/audio/audiofs.c audiofs.c /sys/src/cmd/usb/audio/usbaudio.c usbaudio.c /sys/man/4/usb usb