AJH Synth MiniMod User Manual

Glide + noise

mod

Glide + Noise User Guide

Thank you for purchasing the AJH Synth MiniMod Glide, Hold & Noise module ,which like all AJH

Synth Modules, has been designed and handbuilt in the UK from the very highest quality compo-

nents. We hope that it will help and inspire you towards creating some great music and sound-

scapes!

The MiniMod Glide, Hold & Noise module brings the keyboard glide and random noise genera-

tion circuitry of the legendary Model D synthesiser to Eurorack Modular format, and also adds

considerable extra functionality.

The Glide circuitry uses a discrete transistor di erential ampli er, followed by a dual fet transistor

sample and hold circuit that has the ability to gate the glide e ect. Glide is only active when the

Hold CV input is high, so if the hold input is connected to the gate output of a Midi/CV convertor

then the glide will be active only while a key is actually depressed, emulating the exact behaviour

of the original Model D synthesiser. With the glide control turned to zero it can also be used as a

sample and hold module for voltages in the range 0 to +6 Volts.

We have also increased the versatility of the Glide module by adding Glide Up only and Glide

Down only modes in addition to the standard Glide Up /Down mode of the original circuit.

The Random Noise Generator is completely separate from the Glide circuitry. There are three

outputs o ering White Noise, Pink Noise and Red Noise. The noise source itself is all analogue and

uses a specially selected transistor in avalanche mode which is ampli ed and ltered by discrete

transistor based circuitry.

Module width is 6 HP of Eurorack space and it is compatible with standard Eurorack cases. The

height of the panel is 128.5mm, and depth is 54mm . There are four mounting holes at the

corners of the module and we provide 4 of M3 rack xing screws along with a Eurorack compat-

ible power cable. Current consumption is 35mA from the +12V supply rail and 35mA from the

-12V supply rail.

All AJHSynth modules are covered by a one year guarantee against manufacturing defects.

Note:

It is very important that the power supply ribbon cable is connected correctly, see the "adjustment and

calibration" section for an illustration of the correct orientation.

www.ajhsynth.com

Table of Contents

Do you have a question about the MiniMod and is the answer not in the manual?

Page 1 Glide + Noise User Guide Thank you for purchasing the AJH Synth MiniMod Glide, Hold & Noise module ,which like all AJH Synth Modules, has been designed and handbuilt in the UK from the very highest quality compo- nents. We hope that it will help and inspire you towards creating some great music and sound- scapes! The MiniMod Glide, Hold &...
Page 2 Controls, Inputs and Outputs GLIDE + NOISE Glide speed GLIDE Glide On/O Glide Mode DOWN HOLD Red Noise Output Hold CV Input WHITE CV IN White Noise Output Glide CV Input PINK CV OUT Pink Noise Output Glide CV Output This is the White Noise Output and signal level is +/-5 Volts peak to peak.
Page 3 A Gate Contol Voltage (Of +2 Volts to +10 Volts) applied to this input turns on the Glide 6 Hold CV Input : e ect. If the gate voltage is zero (Low) then “Hold” mode is active and the Glide Output is held at the last voltage received irrespective of changes to the Glide CV Input.
Page 4 Adjustment and Calibration Note: This information is given for completeness, the MiniMod Glide + Noise module is calibrated after manufacture and under normal circumstances should not require any user adjustment. A Noise Level B Glide Scale Hold Source Hold O set...