WiiM Ultra Analog Input as an Source for sonn

[Holzmusik]

WiiM devices—including the WiiM Ultra—have the capability to stream their analog inputs across the network; the latest software version announced that this functionality will also extend to DLNA. It would be a cool feature to be able to use the analog input within Sonos; perhaps it might even be possible to provide full support for WiiM devices in general. Currently, I use my WiiM devices via the built-in Squeezelite player.

[rudyberends]

Sonn zones are already DLNA renderers, so DLNA Out from the WiiM might already reach one. The better fit is to make it a line-in source though, so it can be picked like any other line-in and played in sync across grouped zones. Tracking that in #407.