Opus
More info
- Released
- Type
- Audio codec
- License
- BSD-3-Clause
- Website
- opus-codec.org
- Spec
- RFC 6716
Open, royalty-free audio codec built for real time — the standard in voice calls, Discord and WebRTC.
Standardised as RFC 6716 (2012), a merger of Skype's SILK (speech) and Xiph's CELT (music). The codec switches between modes seamlessly and scales from 6 kbit/s narrowband speech to 510 kbit/s stereo.
Latency goes as low as 5 ms, which is the whole point: MP3 and AAC were built for playback, Opus for conversation. Mandatory in WebRTC and therefore in effectively every video meeting you have ever sat through.