User's Manual

7.1.3. Modulation (Mod) output
The Mod output connector sends voltage values generated by one of three sources inside
the KeyStep: the Mod strip, aftertouch, or velocity. You can use this output to control volume,
filter frequency, or any number of other modules on the target device.
The MIDI Control Center allows you to specify which of the three sources you want to use
to control the Mod output. See Chapter 9 [p.74] to learn about this parameter.
7.1.3.1. Setting the MOD output
The MIDI Control Center allows you to specify which of three types of data you want to use
the Mod output for: Velocity, Aftertouch, or the Mod strip.
See Chapter 9 [p.74] to learn about these parameters.
7.2. Routing the signals
Typically the Pitch (CV) output is connected to a Voltage Controlled Oscillator (VCO), the Gate
output is connected to a trigger input or a Voltage Controlled Amplifier (VCA), and the Mod
output is connected to a VCA or a Voltage Controlled Filter (VCF) or both through a splitter
or a patch bay. Those routings will produce the most predictable results. But you can send
those signals to any parameters that will accept them.
7.3. MOD/GATE/PITCH specifications
Some analog synthesizers have unusual implementations that are not fully compatible with
the KeyStep 37 MOD/GATE/PITCH signals. Please refer to their specifications before making
a purchase so you can be sure the two devices will work together well.
We've designed KeyStep 37 to be as flexible as possible, though: the MIDI Control Center
allows you to configure the response of the MOD/GATE PITCH jacks in a number of ways.
• PITCH has two options, each with its own keyboard reference settings:
◦ 1 Volt/octave (0-10V)
◦ 0 volt MIDI note range: C-2 to G8
◦ Hertz per volt (max ~12V)
◦ 1 volt MIDI note range: C-2 to G8 (1V reference default: C0)
• The GATE output has three options:
◦ S-trigger
◦ V-trigger: 5 volts
◦ V-trigger: 12 volts
• The MOD output has eight options ranging from 0-12 volts. By setting the Max
voltage for this output you can finetune the effect of the MOD output or
accomodate devices that do not well respond to higher voltage levels.
See Chapter 9 [p.74] for a description of the related MIDI Control Center parameters.
Note: The keyboard Shift functions will also work on the CV output! You can change Seq
Pattern type, change the Time Division, Scale and Root Note and set a custom User scale.
65 Arturia - User Manual KeyStep 37 - MOD/GATE/PITCH functions