| wav | Windows Waveform Sound |
| wav | Broadcast Wave Format Audio |
| wave | Windows Waveform Sound |
| wax | Windows Media Audio Redirector |
| weba | WebM Audio |
| wem | Wwise Encoded Media |
| 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 |
| wtpt | WireTap Studio Packaged Track |
| wus | WUTG Tagged Audio |
| wv | WavPack Audio |
| wvc | Wavecraft Audio |
| wve | Psion 8-bit A-law Audio |
| wvz | MUST Music |
| 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 |
| xad | eXotic ADlib Audio |
| xfs | eRacer Sound |
| xi | FastTracker 2 Instrument |
| xiz | ZynAddSubFX Instrument File |
| xkr | Sing-Magic Karaoke Song |
| xm | FastTracker 2 Music Module |
| xma | Xbox 360 Native Audio |
