Intellijel Umod II User Manual

µMod II Manual

Overview

The µMod II is a multi-function module designed for combining audio or CV signals in a variety of ways.
Apart from a versatile ring modulator / four quadrant multiplier it also performs analog logic functions
useful for generating new combinations of waveforms.

The principle of operation is to take two signals, called X and Y, and produce a series of output signals
that are derived from the sources using a variety of analog methods.

Installation

See the Module Installation Guide for instructions on installing the module in your Eurorack modular
system.

Front Panel

Controls

1. QUADRANT
The quadrant knob controls shifts the multiplication in to the positive or negative quadrants. For
standard ring modulation, set the knob at the 12 o’clock position.

2. X +/-
This three position switch controls the rectification of the X input. When in the middle position the
input waveform is unaltered. When at + only the positive half of the waveform is passed through.
When at – only the negative half is passed through.

3. Y +/-
This switch functions the same as the X +/- but for the Y channel.

4. X Attenuator
This knob controls the attenuation of the X signal. It is unaltered when the knob is fully clockwise.

5. Y Attenuator
This knob functions the same as the X attenuator but for the Y channel.

Inputs & Outputs

A. X

X signal input.

B. Y

Y signal input.

C. RING

Ring modulator output.

D. SUM

This output is the result of adding the X and Y inputs, X + Y.

E. DIFF

This output is the result of subtracting the X input from the Y input, Y – X.

F. MAX

This output is the maximum of the X and Y signals at any given point in time. It’s the analog

equivalent of the digital OR operation.

G. MIN

This output is the minimum of the X and Y signals at any given point in time. It’s the analog

equivalent of the digital AND operation.

Analog Logic

The analog logic section of the module produces waveforms that are a combination of the X and Y inputs.
This is well suited to creating complex CV from basic waveforms, or creating new interesting forms of
audio.

The diagram below illustrates what’s possible by combining sine and saw waveforms of two different
frequencies via the various logic outputs: