In message "M-Audio Transit progress report, and uaudio help wanted"
    on 04/08/21, Giles Lean <giles@nemeton.com.au> writes:
>     $ audioplay -d /dev/sound2 -c 2 -P 16 -s 44100 -e slinear_le filename
>     audioplay: failed to open /dev/sound2: Invalid argument
> 
> Suggestions, anyone?

>     uaudio0 at uhub0 port 2 configuration 1 interface 0: M-Audio Transit USB, rev 1.10/1.00, addr 2
>     uaudio0: ignored audio interface with 2 endpoints
>     uaudio0: ignored audio interface with 2 endpoints
>     uaudio0: ignored setting with type 8193 format
>     uaudio0: ignored setting with type 8193 format
>     uaudio0: audio rev 1.00
>     uaudio0: 4 mixer controls
>     audio2 at uaudio0: full duplex, independent

No playback interfaces might be recognized.

SoundBlaster Audigy 2 NX has the similar problem.  Each of its
playback interfaces has two endpoints.  The uaudio driver does
not support multiple endpoints interfaces and ignores them.

-- 
TAMURA Kent <kent2004? at hauN.org> <kent at NetBSD.org>