Quantizer user manual
Kassutronics
Version 1.1
October 15, 2019
Schematics, PCB layout and documentation c
2019 Caspar Ockeloen-Korppi.
Introduction: what is a quantizer?
A typical modular VCO accepts control voltage in the V/Oct scale, meaning that steps of
±
1V
will change the frequency up or down one octave. To play consecutive semitones on a VCO,
you must feed it a voltage increasing in steps of
1
12
V, or
83
mV, since there are 12 semitones
in an octave.
In it's basic form, the quantizer is a module which takes in any voltage and rounds it to
the nearest
1
12
V, allowing your VCO to always play in tune. To make the quantized notes
even more musical, the Quantizer allows you to dene which semitones are allowed with the
scale buttons. More advanced features such as transpositions, chords and CV control will be
discussed later in this manual.
Module overview
Quantizer
Gate
A
Gate
Trig
Trig
Out
B
In
Out
In
11
2
0
4
1
5
10
7
6
8
Shift
A
B
τ
Scale buttons
Function buttons
Quantizer channel 2
Control voltage inputs
Quantizer channel 1
The interface of the quantizer is built around a ring of 12 buttons that dene the quantiza-
tion scale, and four function buttons. The
τ
Shift
button gives access to extra button functions
labeled in blue. For example, pressing
τ
Shift
+ button 6 opens the keyboard mode . Pressing
will return from any menu to the normal display.
User manual version 1.1
1
