- Extension
- .opus
- .sph
- Format
- Binary
- Binary
- Category
- Audio
- Audio
- Developer
- Xiph.Org
- NIST
- Description
- An OPUS file is an audio file created in the Opus format (also called "Ogg Opus"), a lossy audio format developed for Internet streaming. It uses both SILK (used by Skype) and CELT (from Xiph.Org) codecs and supports variable bit rates from 6 kb/s to 510 kb/s.
- Waveform audio file created in the NIST SPHERE format, which is often used in speech recognition research; often contains a recording of a person speaking; can be provided as input to speech recognition systems.
- MIME Type
- audio/opus
- audio/x-nist-sph
