Stereo to Mono
Fold two channels into one, or keep only the side that worked.
Fold two channels into one, or keep only the side that worked. Free, with no sign-up, no watermark and no upload: it all runs in your browser.
What Stereo to Mono is for
A voice recording made in stereo is usually carrying the same signal twice, and folding it to one channel halves the file for nothing anyone can hear. It is also the fix for a recording where only one microphone worked and half the file is silence.
How to use it
- Add your files. Drop them on the page or choose them. They stay on your device.
- Set the output format and quality. The defaults suit most files.
- Press convert and save the results, individually or as one ZIP.
Questions
Will folding to mono lose anything?
On a voice recording made with one microphone, nothing audible — both channels held the same thing. On music it does: anything mixed to sit on one side loses its position, and anything recorded out of phase can partly cancel.
How much smaller does the file get?
Close to half, for uncompressed formats like WAV. For compressed formats the saving is smaller but still real, because the encoder has one channel to describe rather than two.
Only one side of my recording has sound. What do I do?
Choose that channel rather than mixing. Mixing would average the good side with the silent one and halve your volume; taking the single channel keeps it as it was.
Can I go back to stereo afterwards?
You can duplicate the channel, but the separation is gone for good. Keep the original if there is any chance you will need it.