Delta Zero

Delta Zero is a phase-cancellation null-test / difference-checker for audio engineers.

Feed two versions of the same audio (a re-render, a bounce after a plugin change, an A/B of a master) into Delta Zero's main input and sidechain, hit Align, and it finds the sample-accurate timing offset between them automatically via cross-correlation, then outputs only the difference. If the two sources are identical, the output is silence — a perfect null, reaching zero. Anything left over is real, audible, and shown live on a scrolling spectrogram: exactly which frequencies and moments the two sources actually differ at.

Built-in synthetic test signal included, so you can see it working immediately without routing real audio.

Free during the public beta.

Features:

Sidechain-based dual input: main = source A, sidechain = source B.

One-click automatic sample-accurate alignment via cross-correlation.

Live scrolling spectrogram of the residual with a peak-hold contour and a dB colour legend.

Built-in synthetic test signal (no real routing needed to try it out).

VST3 / AU / Standalone, macOS (Universal) + Windows.