Mono vs Stereo: When to Collapse to One Channel
Stereo earns its size on music and film, where left and right differ. Speech recorded through one microphone is nearly identical in both channels — double the storage for zero space. Collapsing speech to mono doubles effective data per channel and fixes one-ear-quiet playback. Here is the judgment rule.
One question decides it
Do the two channels differ? Music pans guitar left and drums right; film uses channels for positioning. A person talking into one microphone produces identical channels — stereo just stores the same data twice.
- Go mono: talking heads, podcasts, lectures, meetings, audiobooks
- Stay stereo: music, film, live recordings — anything with spatial design
Three practical gains of mono
Size: with the compressor's channel option, mono speech sounds better at the same bitrate — or costs half the bitrate at equal quality. Compatibility: some devices play stereo speech with unbalanced ears; mono is identical on both. Consistency: unify mixed-channel voice segments to mono before merging so loudness baselines match.
How to convert
The audio compressor offers keep-original, mono, and stereo — conversion happens inside the same pass as compression, no separate step. Everything runs locally; audio never leaves the machine.