| wfb | Turtle Beach Wavefront MIDI Bank |
| wfd | Turtle Beach Wavefront Drum Set |
| wfp | Turtle Beach Wavefront Patch |
| wma | Windows Media Audio |
| wow | Grave Composer Music Module |
| wpk | MusicSerVer WavePacK Audio |
| wrk | Cakewalk Pro Audio Data |
| wtpt | WireTap Studio Packaged Track |
| wus | WUTG Tagged Audio |
| wusikpack | Wusikstation Sound Package |
| wusiksnd | Wusikstation Sound Data |
| wv | WavPack Audio |
| wvc | Wavecraft Audio |
| wve | Psion 8-bit A-law Audio |
| wvz | MUST Music |
| wwv | WildTangent WAV Audio |
| wyz | WYZTracker Song |
| x0a | Yamaha Motif XS Song Data |
| x0e | Yamaha Motif XS Editor File |
| x0p | Yamaha Motif XS Pattern Data |
| x0s | Yamaha Motif XS Song Data |
| x0v | Yamaha Motif XS Voice Data |
| x3a | Yamaha Motif XF Song Data |
| x3v | Yamaha Motif XF Voice Data |
| x4a | Yamaha MOX6 All Audio Data |
| x4e | Yamaha MOX6 Editor Audio |
| x4v | Yamaha MOX6 Voice Data |
| x5a | Yamaha MX49 Library Data |
| xad | eXotic ADlib Audio |
| xfs | eRacer Sound |
