Using OpenWebRX with an AirSpyHF - ha7ilm/openwebrx GitHub Wiki
Just use Hansi DL9RDZ's fork of libairspyhf+
This version contains airspyhf_rx, which provides raw IQ data to stdout.
Since the output of airspyhf_rx is float, you don't need format conversion in OpenWebRX:
format_conversion = ""
Also mind your start_rtl_command accordingly
start_rtl_command = "/path/to/airspyhf_rx -f{cf} -r /dev/stdout".format(cf=cf)
and of course your samplerate would be 768000
Enjoy!
73 de Stefan DC7DS