# sox > Sound eXchange: play, record and convert audio files. > Audio formats are identified by the extension. > More information: . - Merge two audio files into one: `sox -m {{input_audiofile1}} {{input_audiofile2}} {{output_audiofile}}` - Trim an audio file to the specified times: `sox {{input_audiofile}} {{output_audiofile}} trim {{start}} {{end}}` - Normalize an audio file (adjust volume to the maximum peak level, without clipping): `sox --norm {{input_audiofile}} {{output_audiofile}}` - Reverse and save an audio file: `sox {{input_audiofile}} {{output_audiofile}} reverse` - Print statistical data of an audio file: `sox {{input_audiofile}} -n stat` - Increase the volume of an audio file by 2x: `sox -v 2.0 {{input_audiofile}} {{output_audiofile}}`