| sfl | Sound Forge Audio Data |
| sfpack | SFPack Compressed SoundFont |
| sfr | Sonic Foundry Sample Resource |
| sga | Self-Guard Security Camera Audio |
| sgu | Band-in-a-Box Song |
| sgw | n-Track Packed Song |
| shn | Shorten Compressed Audio |
| sid | Commodore 64 Music |
| sky | SKYT Packer Module |
| skyt | SKYT Packer Module |
| 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 |
| sndr | Sounder Audio Data |
| sndt | SndTool Audio File |
| sng | n-Track Recorded Song |
| sng | Korg Trinity Song |
| 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 |
| sph | HTK NIST SPHERE Data |
| sppack | SPPack Sound Sample |
| spx | Speex Compressed Audio |
| sq | Sony Playstation 2 SCEI Sequence |