sox

sox [options] infiles outfile [effects...]

sox (Sound eXchange) is a command-line audio processing tool. It converts between formats, applies effects, and can record and play audio.The tool supports many audio formats and provides extensive processing capabilities including filtering, mixing, and format conversion.

-r rate

Sample rate.

Number of channels.

Sample size in bits.

Sample encoding.

File type.

Volume adjustment.

Default audio device.

Combine method (concatenate, merge, mix).

trim: Cut portionfade: Fade in/outreverb: Add reverbnorm: Normalizespeed: Change speedpitch: Shift pitchequalizer: EQ adjustmentcompand: Compression

Some formats need external libraries. Complex effects chains can be slow. Quality depends on parameters. Some effects modify duration.

SoX was started by Lance Norskog in 1991 and has been developed by many contributors. It became the Swiss Army knife of audio processing on Unix systems.

ffmpeg(1), lame(1), flac(1), aplay(1)