How to configure sound on docker

After a long series of issues with virtual environnement I succeed in launching rhaspsy on docker by following the official documentation.

But i have folowing error while i try to play sound.
AudioServerException: Command ‘[‘aplay’, ‘-q’, ‘-t’, ‘wav’]’ returned non-zero exit status 1.

I have to admit that it’s my first time using docker…

Command aplay is working well on my host.
I tried to go “into” the conttainer with command docker exec -it ID bash. But I do not know if I have to create /etc/asound.conf file … and how …

The audio device “default” was not sound on my settings.
Just select few devices to test them and it was ok …