The Whimsical Raps Mannequins Three Sisters is an interconnected triple-filter network designed for spectral mixing, formant vowel creation, and multi-voice resonant synthesis.

The Three Sisters comprises three distinct 4-pole filter bands that act as a unified, kaleidoscopic processing system. The module features an unconventional control structure where the FREQ knob adjusts the global frequency of all three bands simultaneously, while the SPAN control alters the distance between them, repelling the bands away from each other to isolate specific frequencies or compressing them into a narrow spectral space.

The module provides both discrete and global (ALL) inputs and outputs, allowing signals to be filtered collectively or broken out into hyper-stereo configurations. The QUALITY control regulates the system's resonance; driving it to maximum forces the three filters to self-oscillate, transforming the module into a three-tone chordal synthesizer capable of acoustic harmonies, discords, or complex FM bell tones. Conversely, low Quality settings attenuate the resonant peaks entirely, acting as a subtle "anti-filter" for smooth, transparent frequency attenuation.

Refreshed hardware iterations feature a complete technical overhaul by the manufacturer. This design includes completely redesigned filter technology for enhanced audio clarity, significantly higher tuning precision across octaves, and integrated compression on the global ALL input path to deliver warm, musical saturation when overdriven.