Mpd apps were a bit lacking in functionality that I needed so I ended up building a "web app" that can do sleep timers and fix the system volume when I get it set too low while using the htpc for movies.
With that and a systemd timer, that starts music playback in the morning, I have completely substituted the sonos "smart" functionality on my sonos speakers.
At the same time, by having my htpc bypass the smart TV, I don't need a complicated sound system that understands hdmi arc or the like. Any 5.1 system will do. At worst I'll need a dumb DAC to power the audio output.
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