I am trying to get an audio stream from Bluetooth to the stdin of
fm_transmitter on my Raspberry Pi 3 / up-to-date Raspbian Stretch.
So far, I got FM-Transmitter running with an ICE-Cast-Stream using ffmpeg & my Pi is playing Music from Spotify via bluetooth (I installed
bluemannext to the things I followed from this Tutorial).
To archive this, I tried using
ffmpeg -f s16le -i hw:0 - | fm_transmitter -f 87.6 - as mentioned in tutorials, and tested with all the other devices listed with
aplay -L. But it can not listen to any of the sources / can't find it.
So as main concern, I am wondering which tool can link an audio-source to the pipe.