OPUS

Opus Audio Format

File extension: .opus Developed by: IETF codec working group Type of format: Audio file format MIME: audio/opus
Opus is a lossy audio coding format developed by Xiph and standardized by the IETF, designed to efficiently code speech and general audio in a single format, while remaining low-latency enough for real-time interactive communication and low-complexity enough for low end ARM3 processors.