- Extension
- .spx
- .aac
- Format
- Binary
- Binary
- Category
- Audio
- Audio
- Developer
- Xiph.Org
- Bell Labs, Fraunhofer Institute, Dolby Labs, Sony and Nokia
- Description
- Audio file compressed using Speex compression and saved in the Ogg Vorbis container format; designed as an audio compression format specifically for speech; compresses voice at 2 to 44 kbps and supports 8 kHz, 16 kHz, and 32 kHz compression in the same bitstream.
- Compressed audio file similar to an .MP3 file, but offers several performance improvements; examples include a higher coding efficiency for both stationary and transient signals, a simpler filterbank, and better handling of frequencies above 16 kHz; maintains quality nearly indistinguishable from the original audio source.
- MIME Type
- audio/ogg
- audio/x-aac
