Hi @Katherine_Dennis ,
The Rotel Volume App is already been written by Boris Schaedler.
Just do a search in this forum on Rotel, and you will find his page: “Roon Extension: Rotel Volume/Source Control” (Roon Extension: Rotel Volume/Source Control).
I have installed it on a Raspberry Pi and it is working perfectly for my Rotel RC-1590.
Kind regards, Frank.
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