- Extension
- .ra
- .sph
- Format
- Binary
- Binary
- Category
- Audio
- Audio
- Developer
- RealNetworks
- NIST
- Description
- RealPlayer created RA for audio streaming. It makes use of various audio codecs from those that deliver high-fidelity sounds to those that record low bitrate audio data. Radio stations mainly used it for online streaming, but current formats have overthrown it.
- 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/vnd.rn-realaudio
- audio/x-nist-sph
