darc2json

Decoder for DARC subcarriers on FM radio

darc2json is a DARC demodulator for Linux/macOS. It takes an FM multiplex signal as input, in raw PCM format, and outputs line-delimited JSON messages. It was designed to be used with the RTL-SDR tool rtl_fm, but it can read any FM multiplex signals. The default input sample rate is 228 kHz.