Turn your Android phone into Amateur Radio Codec2/OPUS APRS enabled DV handheld transceiver (Bluetooth/BLE/USB/TCPIP KISS/Sound modem client for DV digital voice communication)

M17 standard specification

ESP32 based Codec2/OPUS DV hobby UHF 3d printed handheld transceiver aka walkie-talkie

Codec2 low bit rate audio codec Arduino library for ESP32

M17 C library

Standalone M17 Project Voice and Data Packet Encoder and Decoder

A wxWidget free port of ircddbGateway with some more (not yet all implemented) features ;)

A modern, modular, and performance enhanced C/C++ decoder for digital voice. DMR, P25, NXDN, YSF, and more.

Use a FreeDV modem and amateur radio HF transceiver from a Discord voice call!

The host program for the MMDVM and MMDVM_HS

Performance‑enhanced IMBE/AMBE vocoder primitives with modern CMake packaging.

Converts a .vcf export from Google Contacts into a format that can be imported into a BT Smart Hub 2 for use with BT Digital Voice phones

🔊 Enhance voice encoding with performance-boosted IMBE/AMBE vocoder primitives, featuring modern CMake build and easy integration.