Mono stems → poly WAV
Merge mono WAV files into one multichannel WAV
Turn a folder of mono stems — boom, lavs, plants — into a single interleaved multichannel WAV in the exact channel order you want. Compatibility is checked automatically, and nothing is uploaded.
- 1st conversion free
- No installation
- No plugin
- Files stay local
Drop your mono WAV files
Boom, lavs, plants — add them all, then set the channel order
✓ 1st conversion free · ✓ Your files never leave your computer
How it works
01 · Drop your mono files
They appear as a channel list in load order.
02 · Drag to reorder
Set channel 1, 2, 3… exactly as your session expects.
03 · Export the poly WAV
One interleaved file, original sample rate and bit depth.
Your files never leave your computer
Everything runs locally in your browser with the Web Audio API and WebAssembly. No upload, no server, no copy of your rushes anywhere.
Frequently asked questions
- What does merging mono WAVs produce?
- One interleaved multichannel WAV where each source file becomes a channel, in the order you set.
- Do the files have to match?
- Yes — same sample rate, bit depth and duration. The tool checks compatibility and tells you exactly what mismatches before export.
- Can I reorder the channels?
- Drag and drop the list to set channel order, then export. Channel 1 is the first row.
- Does it upload my stems?
- No. The interleaving happens in your browser; the merged file is written directly to your downloads.
Related tools
No more channel headaches