I have a player piano system which for some songs has a vocal or instrumental track. This is delivered via a line-out which is hooked to a small powered speaker inside the piano. Emphasis on small, and mediocre sound tucked up inside.
The piano is in a room with a nice HT system with a Denon 3800 as well as a Google TV streamer.
I can't get that line out to the 3800 -- too far, across areas I can't run wires practically, and even if I did I anticipate major hum (I did this once long ago in a different house with a 60' wire, did not go well). Anyway...
I need a gadget (and even willing to build one, say with an esp32 or a rPi) that will take that line out (it's mono by the way) and stream it to the AVR or Google TV streamer, preferably as mono on both stereo channels (just duplicated).
Quality is largely irrelevant, these are not high sample rate, and it's all mono (the other track is an analog encoded signal that activates the piano servos).
Now... a slight twist on this is that the system playing is one I have full access to, it's a Linux box running Kodi. So an alternative is some mechanism to intercept one track from Kodi and stream it instead... but honestly that sounds harder than a gadget, as ALSA hates me and tends to go wonky when I work with it (the same box has a bunch of custom software I wrote to play midi from musescore). But it's a possibility as well, if there's some mechanism for that.
Note I can't just split it and stream the whole signal while also playing it as output, as it's a 1980's style modem sound if you play both channels. I need to stream just one channel.
Thoughts?
