Using snd-aloop inside a LXC container?

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Hello,
  Is there a way to use the snd-aloop driver inside a LXC container?
i.e. having two audio application inside the container and passing audio
data to each-other

The snd-aloop driver is loaded by the host system.
Inside the container I can see loop devices
According to  alsa-info :

!!Soundcards recognised by ALSA
!!-----------------------------

 0 [Loopback       ]: Loopback - Loopback
                      Loopback 1
 1 [PCH            ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0xe7220000 irq 47

../..



Unfortunately I can't use it inside the container:

sudo cat /dev/snd/controlC0
cat: /dev/snd/controlC0: Operation not permitted

# alsamixer
cannot open mixer: No such file or directory

Did I miss something?

Best regards
Christophe

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