Live demo, simulated radio. Press Start, then tap the wide signal. Nothing here talks to hardware. JoAT SDR is one app to receive, transmit and update firmware on HackRF/PortaPack, RTL-SDR, Pluto-class boards and USRP B210 clones. Press Start and click the wide signal to hear a test FM station in stereo with its RDS name. Pick Aircraft, Ships, APRS or Pagers under Decoders to see what they hear, and the Firmware tab has a simulated SD card. Nothing here talks to hardware.

— dB