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 differential amplifier, followed by a dual fet transistor
sample and hold circuit that has the ability to gate the glide effect. 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 offering 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 amplified and filtered 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 fixing 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.
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