Radio Autoencoder - transmission of vocoder features over radio channels

PortAudio is a cross-platform, open-source C language library for real-time audio input and output.

Open source speech codec designed for communications quality speech between 700 and 3200 bit/s. The main application is low bandwidth HF/VHF digital radio.

A free, open-source, multi-platform application for sending files and messages, using the codec2 HF modems

Open source speech codec designed for communications quality speech between 450 and 3200 bit/s. The main application is low bandwidth HF/VHF digital radio.