sox
play FAIL formats: no handler for file extension `mp3'
apt install libsox-fmt-mp3
fm.sh
sox “$1” -r 22050 -c 1 -b 16 -t wav - | fm_transmitter -f 101.5 -
lame –decode $1 - | fm_transmitter -f 101.5 -
arecord -D plughw:1,0 -c1 -d 0 -r 22050 -f S16_LE | fm_transmitter -f 101.5 -