SNG file format is used for storing information on instruments and notes, not actual audio data. SNG format in MIDI-compatible. SNG document files can be used for playing music using a dedicated software tools, but such files are mostly used when working with musical instruments and equipment.

SNG format is supported by many devices – users can create and playback SNG file on various platforms, but a SNG file can sound different depending on the used syntesizer. Therefore, it is recommended that the same device should be used for creating and playing SNG files.