A-100 Modulators

Module Description Controls Inputs/Outputs
A140 Envelope generator.

4 controls for Attack, Decay, Sustain and Release.

Gate and re-trigger input for multiple A-D phase while gate is on.

3-step switch for 3 time ranges: from some milisecond to a few minutes.

Normal and inverted output. Envelope display with LED.
  • Attack
  • Decay
  • Sustain
  • Release
  • Range, 3-step switch
  • Control LED
  • Gate
  • Retrigger
  • Normal out
  • Inverse out
  • A 145 Low frequency oscillator.

    Modulation oscillator with 5 waveforms: triangle, rectangle (symmetrical) sine rising and falling sawtooth.

    Sawtooth has twice the frequency of the other outputs.

    Reset input for triggered wave start at zero.

    A three-way switch for 3 frequency ranges, from some minutes up to audio range (max 5 kHz) 2 LEDīs for frequency display of triangle / sine and sawtooth.

  • Frequency
  • Range, 3-step switch
  • 2x control LED
  • Reset in
  • Triangle
  • Sine
  • Rectangle
  • Saw up
  • Saw down
  • A 146 Low frequency oscillator.

    Modulation oscillator with the waveforms: positive rectangle, symmetrical (around 0 line) rectangle, sawtooth / triangle

    The waveform is continuously adjustable from rising sawtooth, through triangle to falling sawtooth. The same control affects the pulse width of the square wave.

    A three-way switch for 3 frequency ranges, from some minutes up to audio range (max 5 kHz) 2 LEDīs for frequency display of pulse and sawtooth triangle.

  • Frequency
  • Range, 3-step switch
  • Waveform
  • 2x control LED
  • pos. rectangle
  • sym. rectangle
  • sawtooth / triangle
  • A148 Dual sample and hold.

    Module A-148 has two identical sample & hold modules, designed to produce 'staircase' voltages.

    The signal present at the sample input is sampled at a rate set by the signal at the trigger input, and held at that voltage at the S&H output. The exact shape of the staircase depends on the sort of waveform at the sample input: NOISE or RANDOM signals produce random patterns; an LFO produces rising or falling staircase patterns.

    Two LEDs for each S&H indicate the voltage (positive or negative) of the sampled signal.

    Each S&H

  • 2x LED + / - Control
  • Each S&H
  • Trigger in
  • Sample in
  • S&H Out
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