Rumble: Three-Band Bass Synthesizer by UVI

Rumble splits its signal into Body, Character and Air. Body covers sub-bass through bass and holds the weight and punch of a sound, including 808s and sub kicks. Character covers low-mids through upper-mids and carries the tonal identity of a sound. Air covers upper-mids through treble and handles shimmer, articulation and top-end motion.

Each band carries its own oscillator, wave-shaper and effect slot. The bands then merge through a shared filter stage, a multiband compressor and a master EQ. The developer describes this as the first multiband synthesizer built for bass from the ground up.

The AM Injector routes amplitude modulation between bands, so Body can shape the level of Character, and Character can pump Air, creating rhythmic interaction within a single voice.

Rumble includes nine oscillator models, among them a dual-oscillator analog design, a phase-distortion engine, a vocal formant engine, a wavetable engine with 90+ tables, a sampler with a curated library of mono bass samples, and a specialized kick drum engine.

Ten wave-shaping modes range from gentle saturation to aggressive folding and ring modulation. Six filter circuits include a warm analog-style lowpass, an eight-topology variable filter, a multi-resonant ripple filter and a formant filter with seven morphable vowel sequences.

Each band can load one of 10 FX chains, including impulse-modeled cabinet simulation, four delay algorithms, a spectral transformation engine and five reverb algorithms.