Got a hackrf. Sqeet.
hackrf_transfer -c 127 -f 100000000 hackrf_transfer -r /dev/null -s 20000000
Made quick little fm transmitter.
Only goes a couple feet, so should be okay wherever you do it.
Also doing it on our ham freqeuncies, so doubly so
Audio source comes in from the microphone
Should resample before fm-mod?
When I did, the signal looked better, but deviation from central frequency was way too high. Could low pass, but probably not the way to go
More to come probably