Diagnostic comparison only—not mastering, loudspeaker alignment, acoustic measurement, or certification. Results depend on range, signal energy, window, noise, periodicity, and the stated delay convention.

Source A WAVA channel (zero-based)Source B WAVB channel (zero-based)Generated fixtureFixture delay samplesRange start secondsRange duration secondsMaximum ±lag samplesSTFT/DFT bins Remove DCWindow

WAV policy: RIFF/WAVE PCM 8/16/24/32-bit or IEEE float 32-bit only, ≤20 MiB and ≤1,000,000 decoded samples per source. Sample rates must match; no resampling is performed. Positive lag means B occurs later: correlation pairs A[i] with B[i+lag], so preview alignment advances B by that integer lag.

Frequency-dependent phase / coherence

Frequency	Transfer magnitude	Phase	Coherence	Energy qualified

Audio Phase Alignment Explorer

Frequency-dependent phase / coherence

Warnings and conventions