speex

Open-source audio codec optimized for speech compression

brewmacoslinux

Try with needOr install directly

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Audio codec designed for speech

speexencspeexdec

Encode a WAV file to Speex format$ speexenc input.wav output.spx

Decode a Speex file back to WAV$ speexdec output.spx decoded.wav

Encode with quality setting (0-10, default 8)$ speexenc -q 7 input.wav output.spx