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The E-RM Polygogo is a stereo oscillator which employs the all-new method of Polygonal Synthesis, providing visual analogies for complex sound generation and tone shaping. Developed by E-RM themselves, polygonal synthesis provides unmapped sonic territory to even the most seasoned synthesists.
Polygogo uses a series of simple parameters to create a two-dimensional representation of a sound. By generating polygonal shapes, users have the ability to alter the harmonic structure of a sound and its distribution between the module’s left and right outputs. The Order parameter determines the number of sides to the shape (and thereby the ratio of the sound’s overtones), while Roll rotates the shape and alters the stereo distribution and timbre. Order can generate shapes from lines to circles and everywhere between, allowing users to either lock to closed polygonal shapes or partial shapes between typical polygons.
The Teeth and Fold parameters allow users to distort the shape to alter the overtone structure. Teeth tilds the side of the polygon inward, creating disjunct assortments of lines and different angles—in effect altering the balance between the fundamental and its overtones. Fold is an analog process which distorts the shape and folds it back inward at its outer boundaries, creating everything from subtle fizziness to outright distortion.
Polygogo also features a dedicated FM operator with variable frequency and modulation index. The FM Ratio can be quantized or unquantized for locking onto more or less harmonically stable effects, and the FM Amount goes from subtle growls to intense aliased tones.
Bringing an entirely new set of techniques to the world of synthesis, Polygogo is as sonically striking as it is visually beautiful—great for everything from subtly evolving drones and heavy basslines to animated, alien noise.