Working with Stereo Channels – Mono, Swap, Width

Task	Tool
Keep only the left or right channel as mono	Channel Info › make mono (L or R)
Swap left and right	Channel Info › flip channels
Turn mono into stereo	Channel Info › mono to stereo
Widen or narrow the stereo image	Stereo width
Fix phase-reversed recording	Invert
Change channel count on export	Convert / Export › channels

Common situations

Split L/R recording: mic on left, system sound on right. Make mono from the side you need.
One dead channel: keep the good channel as mono, then convert to stereo if needed.
Thin sound in mono: one channel may be inverted. Invert it and compare.

How do I turn a stereo file into mono?

Use Channel Info to make the file mono from the left or right channel, or choose mono in the output settings when you convert.

One channel is silent. Can I fix it?

Yes. Make the file mono from the channel that has sound, then convert it back to stereo if you need two channels.