2 way audio between HA and VTO

[alve89]

Is your feature request related to a problem? Please describe.
I ordered a VTO2202F-P and thought of realising a video intercom with the person who's at the door. To be able to hear the guest and speak to him there's a need to have access to the digitally delivered audio of the VTO.

Describe the solution you'd like
If HA is installed on Raspbian (not as HassOS), is there already a way to access the audio-interfaces? So you easily could use an USB microphone as input and an HDMI or USB or 3.5 mm audio jack as output.

Describe alternatives you've considered
I'm quite new to RPi and Linux, so I'd try to solve this directly within a Linux without HA - but both together would be the best and all-in-one solution.

Additional context

[luzik]

Duplicated #55

[luzik]

Please refer #181 (comment)