If you work in film, television, or live sound, you’ve probably encountered polyphonic WAV files — often called poly WAV. They come from field recorders, DAW exports, and broadcast equipment. And if you’ve never had to work with them before, they can be confusing.
This article explains what poly WAV files are, when you’ll encounter them, and how to manage them efficiently.
What is a polyphonic WAV file?
A standard stereo WAV file contains two audio channels: left and right. A polyphonic WAV file contains more than two channels — anywhere from 3 to 32 or more — all stored in a single file. Each channel is a completely separate audio signal.
Field recorders like the Sound Devices MixPre and Zoom F8 record poly WAV by default. If you had 6 microphones running simultaneously, the recorder writes all 6 channels into one file. That’s a poly WAV.
When do you encounter poly WAV files?
- Location sound recording — field recorders create poly WAV when multiple microphones are recorded simultaneously
- DAW exports — some sessions are exported as multi-channel WAV stems
- Broadcast audio — 8-channel delivery files used in television broadcasting
- Archival recordings — multi-track recordings from live events or studio sessions
Splitting a poly WAV into mono files
Post-production editors often need individual mono files rather than a multi-channel poly WAV. Most NLEs can import poly WAV, but working with individual mono files is cleaner and more compatible with different workflows.
Wave Copilot splits any poly WAV file into individual mono tracks in one click. The output files are named using the track name metadata from the original file — so if your recorder named channel 1 “BOOM” and channel 2 “LAV1”, the output files will reflect those names. All metadata is preserved.
Combining mono files back into poly WAV
The reverse operation is equally common. If you have a set of processed mono files that need to be combined into a single poly WAV for delivery — or to send back to the mixer — Wave Copilot handles that too. You can drag-and-drop files to reorder the channels before combining.
Conclusion
Poly WAV files are the standard for professional multi-channel audio recording and delivery. Understanding how to split, combine, and manage them is a core skill for anyone working in audio post-production or location sound. Wave Copilot’s free trial is the fastest way to try it in your own workflow.