The A-165-2 Digital Modifiers from Doepfer contains six different modification circuits for digital signals that are derived from the two input signals. The following functions are available:

• inverted signal to input 1
• inverted signal to input 2
• T flip-flop (toggle flip-flop), controlled by input 1
  
  • this output changes its state on the rising edge of input 1 (labeled 1/2, as it works like a 1:2 frequency divider)
• Set/reset flip-flop
  
  • this output changes its state to "high" on the rising edge of input 1 and goes to "low" on the rising edge of input 2
• Inverted output of the set/reset flip-flop
  
  • this output changes its state to "low" on the rising edge of input 1 and goes to "high" on the rising edge of input 2
• Pulse output
  
  • A trigger pulse of approx. 50 ms in length is generated on both the rising and falling edge of the signal applied to input 1

The module can be used wherever a targeted start/stop of events or switching processes (e.g. triggered by trigger outputs of a sequencer, e.g. in combination with electronic switches), an inverted digital signal, frequency halving or the provision of pulses on the rising and falling edge of a digital signal is required. The module is not suitable for bipolar signals, whether digital or analog! With bipolar signals, the negative part of the input signals is cut off. analog control signals are only processed to a limited extent.