| sd2f | Sound Designer 2 Sound |
| sdat | Nitro Composer Sound Data |
| sdii | Sound Designer 2 Audio |
| sds | MIDI Sample Dump Standard |
| sdx | MIDI Sample Dump Exchange |
| sf | IRCAM SoundFile |
| sf2 | EMU SoundFont v2.x Banks |
| sfa | Sonic Foundry Audio File |
| sfap0 | Sound Forge Audio Proxy |
| sfark | sfArk Compressed SoundFont |
| sfd | SoundStage Sound File Data |
| sfi | SoundStage Sound File Info |
| sfk | Sound Forge Peak Data |
| 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 | SndTool Audio File |
