Mono loss challenge: hear phase cancellation, not just a meter
The browser generates a stereo harmonic signal whose channels differ in phase. Compare versions and hear what a correlation warning means.
Diagnosis
- Keep playback moderate.
- Start with A.
- Switch to B without changing the volume control.
Decision
- Listen for components that shrink or move.
- Use the real mono test on your own file next.
- Relate the audible change to phase, not just width.
Measurement boundary
The generated signal is intentionally simple; real mixes contain many independent phase relationships.
Common failure: Do not use the challenge signal as a target for how wide a real mix should be.
Mono-sum challenge
Audio is synthesized locally. Keep playback moderate.