This Module is currently available.
Specs are approved by the manufacturerThree-operator phase mod/FM Voice
Grackle from Entropic Loop is a three-operator phase modulation voice with a unique take on a familiar architecture. Phase modulation, popularly known as FM synthesis, gained popularity in the 1980s with the rise of more affordable digital synthesizers such as the Yamaha DX-7 after being developed by researcher John Chowning while at Stanford University in the late 1960s. While Grackle uses the fundamental techniques found in FM synthesizers, its implementation is unique; unlocking a new dimension in digital synthesis with sounds that stretch from the familiar to deep uncharted territory. Although it has a distinctly digital sound, Grackle's interface is immediate and playable in a way that almost feels analog.
3 operator FM (phase modulation) synthesis with a unique, just-intonation-based approach to setting modulator ratios that uses the harmonic series
3 operator configurations (algorithms):
ADD: Both MOD operators are added together and used to modulate the phase of the carrier
MUL: Both operators are multiplied together before being run through a 7-stage triangular wavefolder
CASCADE: MOD1 operator modulates the phase of MOD2 operator, MOD2 then modulates the phase of the carrier
Built-in VCA envelope with 3 modes:
TRIGGERED: Envelope is triggered on a rising edge to the gate input
ASYMEMETRIC SLEW: Envelope follows the state of the gate input
CYCLING: Continuous cycling while gate is high
Individual, audio-rate CV control over modulator intervals, modulator depth, pitch, interval denominator, algorithm type, and envelope growth and decay
Additional AC-coupled "ActualFM" input for true, through-zero FM
Dedicated envelope and mod oscillator outputs; useful for modulating external modules, patch programming new modulation paths, and complex feedback possibilities
