E-RM Polygogo Graphical Stereo Oscillator

The E-RM Polygogo Graphical Stereo Oscillator is a 32HP Eurorack module that provides users with unparalleled control over modulation. Utilizing Polygonal Synthesis developed at E-RM, the Polygogo module offers a range of knob-per-function parameters to shape sound and create unique, high-quality audio.

Hybrid Design

The Polygogo oscillator features a hybrid design, incorporating a digital processor for precise frequency tracking and stability, as well as classic analog output circuitry to retain a crisp, open sound.

Intuitive Interface

Designed in collaboration with instrument designer Tatsuya Takahashi, the Polygogo utilizes a ‘knob-per-function’ design for ease of use in live environments. Each feature is easily accessible without the need to scroll through menus.

Polygonal Synthesis

Polygonal synthesis is based on complex two-dimensional amplitude shaping of sine waves, and the Polygogo module offers five separate parameters for users to shape their sound:

Order: sets the overtones by defining the number of corners on the polygon. This affects the ratio of overtones with respect to the fundamental frequency.
Teeth: tilts the sides of the polygon out of the normal orientation and can be used to control the loudness of the overtones. This parameter acts as a balance between the fundamental frequency and the overtone spectrum.
Roll: rotates the object around the center and animates the waves to create spatial movement.
Operator: modulates the fundamental frequency for FM madness with precise frequency tracking. FM Ratio and FM Amount can be adjusted and quantized to source.
Fold: overflows the wave to the other side, resulting in a tickling noise at low settings and total distortion at high settings.

Additional Features

High-contrast OLED display
6 long-range sliders with dust covers
8 high torque potentiometers
11 mini jack connectors for inputs and outputs
3 push buttons and LEDs
Built-in FM operator
Low-frequency panning modulator
Analog wave overflow output stage
2x high-speed V/oct and exponential FM inputs (24 bit / 96 kHz)
6x actively filtered CV inputs (16 bit / 6 kHz)

Specifications

Size: 32 HP wide, 26 mm in depth
Power: 110 mA @ +12 V, 15 mA @ -12 V
Weight: 266 g
Product code: ERPogo

Product Reference	155312
Design	Hybrid design with digital processor for modulation and classic analog output circuitry
Synthesis Method	Polygonal Synthesis developed by E-RM based on two-dimensional amplitude shaping of sine waves
Parameters	5 separate parameters for setting overtones, animating the spectrum, creating discontinuities in the waveform, modulating with precise ratios, and overflowing waves to the other side
Interface	'Knob-per-function' design for easy access to all parameters without scrolling through menus.
Stereo Output	Stereo wave-overflow output with classic analog circuitry for crisp and open sound.
Input and Output Jacks	11 mini jack connectors for inputs and outputs.
FM Modulation	Built-in FM operator for precise frequency tracking and linear FM modulation.
Display	High contrast OLED display for clear visibility.
Sliders and Potentiometers	6 long-range sliders with dust covers and 8 high torque potentiometers.
Power	Power consumption of 110 mA @ +12 V, 15 mA @ -12 V.
Dimensions	32 HP wide and 26 mm in depth.
Weight	Weighs 266 g.
Other Features	Low frequency panning modulator, 2x high speed V/oct and exponential FM inputs, and 6x actively filtered CV inputs.
Product Code	ERPogo

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