Controls, inputs and outputs – AJH Synth MiniMod Glide & Noise User Manual

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OFF

CV OUT

CV IN

HOLD

DOWN

GLIDE + NOISE

RED

PINK

WHITE

GLIDE

Glide speed

Glide On/Off

Red Noise Output

White Noise Output

Pink Noise Output

Glide Mode

Hold CV Input

Glide CV Input

Glide CV Output

1 White Noise Out :

This is the White Noise Output and signal level is +/-5 Volts peak to peak. Pure white noise

is a sound that contains every frequency within the audio range (generally from 20 hertz

to 20 kHz) in equal amounts. This white noise is generated by using a specially selected

transistor in avalanche mode and using the exact circuitry from the Model D synthesiser,

so it is a vintage analogue approximation of pure white noise.

2 Pink Noise Out :

This is the Pink Noise Output and signal level is +/-5 Volts peak to peak. Pure pink noise is

white noise that has been filtered to reduce the volume of each increasing octave, which

compensates for the increase in the number of frequencies per octave. Each octave is

reduced by 3 decibels, resulting in a noise signature that has equal energy at every

octave. This pink noise is generated using the same discrete transistor circuitry as the

vintage Model D synthesiser and is an analogue approximation of pure pink noise.

3 Red Noise Out :

This is the Red Noise Output and signal level is +/-5 Volts peak to peak. Red (or Brownian)

noise is more heavily filtered than pink noise, at the rate of 6db/octave or more, so that it

has a much lower high frequency content. It is most commonly used as a random control

voltage rather than an audio signal.

4 Glide On/Off :

This switch turns the Glide effect on/off. It is NOT a bypass switch, its function is the same

as turning the Glide Speed control fully counter clockwise.

5 Glide CV Input :

This is the Control Voltage (CV) Input to the Glide module. The acceptable input voltage

range is +/- 10 Volts. However only positive voltages (0 to +6 Volts) are processed,

negative voltages are ignored and voltages between +6V and +10v are limited to +6v.

The most common application would be to feed in a 1V/Oct signal from a Midi/CV

converter, however it’s use is not limited to this and the module can be used for many

different up/down slew effects.

Controls, Inputs and Outputs