SpecCraft

SpecCraft is a dynamic resonance suppressor, spectrum compressor, and smart EQ from Three Body Technology. It works by analysing the incoming audio frame-by-frame and applying narrow cuts exactly where unwanted resonances occur, whether that’s sibilant harshness on a vocal, a boxy room frequency on overhead mics, or low-end mud on a synth or acoustic instrument. The threshold detection uses a ZDF (Zero Delay Feedback) envelope detector, which gives it more accurate and musical behaviour than conventional detector designs, particularly on transient material.

What separates SpecCraft from a basic dynamic EQ is its self-adaptive spectral compensation system. After suppressing resonances, it continuously calculates compensation curves to fill the spectral void, applying broad boosts alongside the narrow cuts automatically on every audio frame. There’s also dynamics compensation to restore perceived loudness, formant boost to preserve vocal character, and a profiling system that lets you extract a custom threshold shape from a reference file. It supports up to 8x oversampling, runs in zero-latency minimum phase mode for live use, and includes an 8-band parametric sidechain EQ built on the Kirchhoff-EQ engine.