| sma | SmartMusic Accompaniment |
| smaf | SMAF Audio |
| smf0 | Standard Midifile Type 0 |
| smf1 | Standard Midifile Type 1 |
| smp | SampleVision Audio Sample |
| snc | Sonarc Compressed Audio |
| snd | Macintosh Sound Resource |
| snd | SndTool Audio File |
| snda | Aleph One Sound File |
| sndh | Atari ST Audio Data |
| sndr | Sounder Audio Data |
| sndt | SndTool Audio File |
| sng | Faust Music Creator Music |
| sng | Korg Trinity Song |
| sng | n-Track Recorded Song |
| sng | SNGPlay Song Data |
| sngw | Devil May Cry 4 Audio Data |
| sngx | ChordWizard Songtrix Song |
| snsf | SNES Sound Format File |
| snu | Dead Space Game Audio Data |
| son | SBStudio II Song |
| sop | NOTE Music Tracker Song |
| sou | SBStudio II Sound File |
| sox | SoX Uncompressed PCM Audio |
| spc | Super Nintendo Audio Data |
| sph | HTK NIST SPHERE Data |
| spm | StoneTracker Music Module |
| sppack | SPPack Sound Sample |
| sps | StoneTracker Audio Sample |
| spu | Sony Playstation Audio Data |
