Opus
Opus audio codec (RFC 6716): API and operations manual
1.2
Opus

The Opus codec is designed for interactive speech and audio transmission over the Internet.It is designed by the IETF Codec Working Group and incorporates technology from Skype's SILK codec and Xiph.Org's CELT codec.

The Opus codec is designed to handle a wide range of interactive audio applications, including Voice over IP, videoconferencing, in-game chat, and even remote live music performances. It can scale from low bit-rate narrowband speech to very high quality stereo music. Its main features are:

Documentation sections:

For more information visit the Opus Website.