How I used Go to make my radio auto-switch to AUX-IN when a Raspi plays music, so your radio lacks AirPlay support. Fetch a Raspberry Pi, put Shairport-sync and Raspotify on it, plug it into AUX port, and glue everything together with some Go code.
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The problemThe radio has an AUX-IN port, but…A pleasant surpriseUsing Go to connect the dangling wiresSort: