HarmonEQ is a harmonic exciter plugin that adds musical harmonics and saturation to your audio. Unlike traditional equalizers that simply boost or cut frequencies, HarmonEQ creates perceived loudness and presence without significant peak level increase. Three parallel harmonic bands (LO shelf, MID peak, HI shelf) each extract their frequency content, apply harmonic generation through one of six selectable saturation types, then sum back with the dry signal. The parallel architecture means bands interact musically rather than cascading, preserving natural tonal balance. Dual-channel Stereo and Mid-Side processing modes let you shape mono and stereo content independently. Add warmth to Mid, air to Side, or process linked stereo with a single set of controls. Each channel has its own input/output gain, three EQ bands, progressive-slope cut filters, and a full dynamics section with Expand, Compress, and Transient shaping that can be selectively applied to LO, MID, or HI frequency bands. Six per-band saturation types (MAIN, TUBE, WARM, SOLID, TAPE, CLEAN) give each band its own harmonic character, from the signature smooth MAIN inflator curve to punchy TAPE compression and transparent CLEAN mode. Mix and match across bands for endless tonal combinations. The selectable Quality mode (Normal / Medium / Best) provides 1×, 2×, or 4× oversampling with Kaiser-windowed FIR anti-alias filtering for pristine saturation at any drive level. The unique De-Emphasis mode isolates only the added harmonic content for subtle enhancement, while the automatic Scoop control reduces low-mid muddiness proportional to your boost settings. Clip 0dB provides soft-clipping followed by hard-limiting to prevent digital overs, and the x2 switch doubles all band intensities for more aggressive harmonic content. With phase-aligned dry/wet mixing, automatic latency compensation, and a clean signal path from input to output, HarmonEQ delivers the warmth, presence, and dimension of analog outboard in a modern, precise plugin.