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.
The Speex format also supports intensity stereo encoding, noise suppression, echo cancellation, variable bitrate (VBR) encoding, Voice Activity Detection (VAD), and Discontinuous Transmission (DTX).
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