Opus
lastmod 2018-08-17created 2017-06-052 edits
An open-source, royalty-free, lossy audio codec format. The specification is also fully public. RFC6716
Standardized by the IETF (Internet Engineering Task Force), and created with development support from Xiph.Org, Skype, and several other organizations.
A codec succeeding Speex. Although developed for VoIP, it also performs excellently for music storage and streaming.