virtual_oss: Could not connect to cuse module

[Graham Perrin]

virtual_oss(8)
<https://www.freebsd.org/cgi/man.cgi?query=virtual_oss&sektion=8&manpath=Ports>

Below, please, what am I doing wrong?

I use analogue by default (when the notebook starts), I sometimes 
connect a USB headset.

----

$ whoami
grahamperrin
$ sudo service virtual_oss restart
grahamperrin's password:
Stopping Virtual OSS config dsp ... done
Starting Virtual OSS config dsp ...hw.snd.basename_clone: 0 -> 0
  done
$ kldstat | grep cuse
  5    1 0xffffffff821bb000     bdf8 cuse.ko
$ cat /dev/sndstat
Installed devices:
pcm0: <ATI R6xx (HDMI)> (play)
pcm1: <IDT 92HD81B1X (Analog 2.0+HP/2.0)> (play/rec) default
pcm2: <IDT 92HD81B1X (Analog)> (play/rec)
pcm3: <USB audio> (play/rec)
Installed devices from userspace:
dsp: <Virtual OSS> (play/rec)
$ virtual_oss -C 2 -c 2 -r 48000 -b 24 -s 8.0ms -f /dev/dsp3 -d dsp
virtual_oss: Could not connect to cuse module
$ dmesg | tail -n 18
ugen0.6: <SteelSeries SteelSeries Siberia 350> at usbus0
uaudio0 on uhub1
uaudio0: <SteelSeries SteelSeries Siberia 350, class 0/0, rev 1.10/2.08, 
addr 8> on usbus0
uaudio0: Play[0]: 48000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 44100 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 22050 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 16000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 11025 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Play[0]: 8000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 48000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 44100 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 22050 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 16000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 11025 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 8000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: No MIDI sequencer.
pcm3: <USB audio> on uaudio0
uaudio0: HID volume keys found.
$ date ; uname -v
Mon  7 Dec 2020 00:25:16 GMT
FreeBSD 13.0-CURRENT #72 r367936: Sun Nov 22 21:46:00 GMT 2020 
root at mowa219-gjp4-8570p:/usr/obj/usr/src/amd64.amd64/sys/GENERIC-NODEBUG
$