It can serve as a pure audio file format if only one command and one sound sample is stored in it.
Programs supporting audio files with the .snd extension generally assume, and check, that it is NeXT/SUN (AU) format.
Electronic music instrument manufacturer Akai had an audio file format with the extension .snd.
[2] The manufacturer of the HOM-BOT Robot Vacuum Cleaner LG Group and the VTech V.Flash use audio files with the extension .snd.
The sounds are encoded in PCM (single channel, 16 kHz, 16 bits signed).