@Hans_N, I’ve looked around and don’t see an option in Roon proper to connect an external audio source.
There is however an extension that allows for playing music from e.g. a phone, rooPlay - From LP, CD and iPhone to Roon. Connection is possible either via wifi or USB. However, Roon extensions need to be installed on a Linux server, e.g. a Raspberry Pi, or possibly a virtual Linux server running on an always-on Windows or Mac machine. In short, extensions require an always-on Linux server. They cannot be installed on a Roon server, nor on a Raspberry Pi running the Ropieee end point OS.
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