Subzix splits your signal with a Linkwitz-Riley crossover, sums the bass to mono for club compatibility, and gives you surgical control over the low end. Everything above the crossover stays untouched unless you want it processed.Crossover + Bass Shaping• Linkwitz-Riley crossover at 24 or 48 dB/oct with a draggable frequency divider• Mono bass summing below the crossover for club-safe playback• Bass saturation in three modes: Warm (tanh), Punch (asymmetric clip), Grind (tube with 2nd harmonic)• Envelope shaper with independent attack and sustain controlSub Enhancement• Octave-down sine harmonics generated from autocorrelation pitch detection• Bass Key locks sub harmonics to a musical note• Sidechain pulse — internal transient-triggered ducking• SUB DROP triggers an instant sub-bass drop effectTop Band• Mid/Side stereo width control above the crossover• Bitcrush and dropout texture on the side channel• Low band stays mono while the top keeps its stereo imageMonitoring• Freezer display with Ice Score, phase correlation and a live sub oscilloscope• Tuning indicator with detected note name and sharp/flat deviation• RIG CHECK — mono fold to verify your low end survives a club system• THAW bypass toggle for quick A/B against the dry signal• Bass DNA — text report of your bass characteristics• Frequency Seed — hex-encoded settings for sharing12 factory presets including Club Ready, Kick Punch, Sub Weight, Sidechain Pump and Master Bus.AU, VST3 and Standalone — Universal Binary (Apple Silicon + Intel), code-signed and notarized by Apple so it installs cleanly on macOS.Requires macOS 15.0 or later. Requires a 64-bit AU or VST3 host.