M17 digital voice mode live - test and comparison (ADALM-Pluto SDR, QRadioLink)
Channel: Adrian M
Date: 2022-09-07

Live test and comparison of the amateur radio digital voice mode M17 with other Codec2 modes (bitrates of 1400 bit/s and 700 bit/s) and Opus (bitrate of 9400 bit/s).
Codec2 3200 mode as implemented by M17 has quite good frequency reponse and intelligibility even when compared with Opus.
The M17 implementation in QRadioLink is WIP - not optimal and still some issues as seen here. Thanks to the OpenRTX project for the work they do on M17 (this is based on their implementation of the protocol).