Overview
Opus is a highly versatile audio codec suitable for a wide range of audio applications, including Voice over IP, videoconferencing, in-game chat, and even remote live music performances. It's designed for interactive speech and music transmission over the Internet but also intended for storage and streaming. Opus can scale from low bitrate narrowband speech to very high quality stereo music. It supports bitrates from 6 kb/s to 510 kb/s and sampling rates from 8 kHz to 48 kHz. Frame sizes range from 2.5 ms to 60 ms, with support for both constant and variable bitrates. Opus is standardized by the IETF as RFC 6716, incorporating technology from Skype’s SILK codec and Xiph.Org’s CELT codec, offering good loss robustness and packet loss concealment.