Speaker-test
lastmod 2026-11-10created 2020-09-063 edits
speaker-test is a command-line tool included with ALSA (Advanced Linux Sound Architecture) that sends a test tone to each channel of a sound device to check speaker connections and channel layout. -D specifies the device, -c the number of channels, and -t the type of test signal among sine wave, pink noise, and WAV file; it can also play a voice such as "Front Left" on each channel. It is used on Linux to check whether multichannel output or a particular sound card works.