Miscellaneous

Module Description Controls Inputs/Outputs
A 180 Multiple jack.

Module A-180 is a simple multi-connector, with eight inter-connected sockets.

The sockets can be split into two groups of four by disconnecting an internal solder bridge.


  • 8 Jacks
A162 Trigger delay.

Module A-162 contains two separate delay circuits for trigger signals. This module makes it possible to delay the onset of a trigger pulse, and also change its length.

On each of the trigger delays, two controls can alter the onset time and duration of triggers, from 0 up to round about ten seconds.

A control LED indicates the onset and duration of the new trigger.


  • Delay time
  • Length
  • Control (LED)

  • 2x in
  • 2x out
  • A119 External Input / Envelope Follower. A119 allows external audio signals to be integrated into the System A-100. It comprises a pre-amp, envelope follower, and comparator.

    The pre-amp has two inputs: an unbalanced input for line level signals, with a gain factor of from 0 to 20, and a balanced input with a gain factor of from 0 to 500, for insertion of low level signals, for instance from a microphone or electric guitar. The Envelope Follower reads the signal level of the input, and puts out a proportionalvoltage as an envelope at its own output. The comparator generates a gate signal whenever the input goes above anadjustable trigger threshold.Three LEDs help you keep track of overload, the envelope, and the gate signal.


  • Audio level
  • Threshold

  • Audio in (1/4" Stereo jack)
  • Audio out
  • Envelope
  • Gate
  • A128 Fixed filter bank.

    The filter bank is made up of 15 parallel band pass filters, all with fixed middle frequencies and bandwidth (50 Hz / 75Hz / 110Hz / 150Hz / 220Hz / 350Hz / 500Hz / 750Hz / 1.1kHz / 1.6kHz / 2.2kHz / 3.6kHz / 5.2kHz / 7.5kHz / 11 kHz).

    Each band pass filter has its own amplitude control knob, with which that frequency band can be attenuated. Each filters bandwidth is approximately half an octave.

    The Audio output contains a mix of all the filters, depending on the position of each one's amplitude control knob. The filter bank's main job is to emphasise individual sections of the whole audio frequency range.

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