DAC+ ADC

I have a question regarding streaming an analogue source/signal using a DAC + ADC (or similar device) with a Raspberry Pi running Volumio , to one or more other Raspberry Pi’s running Volumio on the same local network.

Basically, I have a number of analogue devices in one room of my house but I’d like to be able to listen to the audio from them in other rooms where I have Raspberry Pi’s running Volumio.

I understand this should be possible with the paid for version of Volumio but I have been unable to find any further information or instructions on how to do it.

I also understand that this is possible using other methods but I really like Volumio and already use it on my devices for web radio and Spotify so it would be nice to have the option of streaming an analogue source also in Volumio so I have everything in one app…

Thanks.