Audio Downmixer Online
or drop files here
Audio Downmixer
Reduce multichannel audio to a mono or stereo WAV using speaker-layout mixing. The browser decodes the source layout and its Web Audio speaker downmix rules combine channels. The decoded channel count is shown; codec support depends on the browser.
- Dedicated audio downmixer controls
- Local 16-bit PCM WAV export
- Live playback with A/B comparison
Inspect decoded channels
A supported source may decode into more than two channels. The file summary reports that decoded count; an unsupported surround codec may fail before any mixing can occur.
Select a smaller speaker layout
Choose one output channel for mono or two for stereo. Web Audio speaker-layout rules combine the decoded channels, rather than simply exporting only the first channel and discarding every other one.
Check dialogue and effects
Listen to center dialogue, surround ambience and low-frequency content in the result. Layout interpretation and downmix rules can affect their balance; this tool does not expose custom per-channel matrix coefficients.
Budget PCM storage
At 44.1 kHz and 16 bits, mono sample data requires 88,200 bytes per second and stereo requires 176,400. These figures describe the uncompressed download, not the size of an incoming compressed surround container.
Technical references: Web Audio API specification