sox

Sound eXchange: play, record and convert audio files. Audio formats are identified by the extension. More information: https://sox.sourceforge.net.

• Merge two audio files into one:

sox -m path/to/input_audio1 path/to/input_audio2 path/to/output_audio

• Trim an audio file to the specified times:

sox path/to/input_audio path/to/output_audio trim start duration

• Normalize an audio file (adjust volume to the maximum peak level, without clipping):

sox --norm path/to/input_audio path/to/output_audio

• Reverse and save an audio file:

sox path/to/input_audio path/to/output_audio reverse

• Print statistical data of an audio file:

sox path/to/input_audio -n stat

• Increase the volume of an audio file by 2x:

sox -v 2.0 path/to/input_audio path/to/output_audio