Online Tool Store
Audio Mono Compatibility Checker
Audio Mono Compatibility Checker shows which band disappears, which is more useful than a correlation meter reading you have to interpret.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Audio
Audio Mono Compatibility Checker
Frontend preview — no upload or external service.
Mono summing report
Detected a 3 dB level difference and 8% frequency loss between stereo mix and mono sum in the high-mid band.
How the Audio Mono Compatibility Checker works
- Load the stereo mix, which is analysed in the browser.
- Compare the stereo and mono levels overall, then by frequency band.
- Investigate any band losing more than a few decibels. Wide stereo effects and doubled parts are the usual culprits, and bass content should be near mono already.
The method
Summing to mono adds the two channels. Content that is out of phase between them cancels rather than adding.
identical channels sum +6 dB; opposite-phase channels cancel to silence
A stereo widener that creates width by phase inversion sounds impressive in stereo and vanishes in mono.
FAQ
Why does mono compatibility still matter?
Because a lot of listening happens on single-speaker devices — phone speakers, smart speakers, club and venue systems, and many laptop configurations. A mix that collapses in mono loses parts entirely on those.
What causes the cancellation?
Out-of-phase content between channels. Stereo wideners that work by phase inversion are the worst offender, followed by doubled parts recorded with a slight time offset.
Should bass be mono?
Below roughly 100 Hz, usually yes. Low frequencies carry little directional information, and keeping them centred avoids both phase cancellation and problems cutting vinyl.
How we compare
| Feature | Online Tool Store | A DAW | A streaming app |
|---|---|---|---|
| Nothing uploaded | ✓ | ✗ | Depends |
| Per-band loss | ✓ | ✓ | ✗ |
| No install | ✓ | ✗ | ✓ |
| Identifies the culprit band | ✓ | Meter only | ✗ |
Audio Mono Compatibility Checker shows which band disappears, which is more useful than a correlation meter reading you have to interpret.