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BMC019 - Delaying AR PCB | Barton Musical Circuits

BMC019 - Delaying AR PCB | Barton Musical Circuits


This is a microcontroller based module that combines an Attack-Release Generator with a delay. It can be built in either +/-12V or +/-15V systems without any modification, and other than the pre-programmed microcontroller, uses no hard to find parts. When used with the expander from BMC003, it has voltage control over all of the parameters.

This is for a PCB (including programmed microcontroller) only suitable for multiple formats.

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Availability:In stock

The Delaying AR is designed primarily for use with VCAs to imitate the sound of a synthesizer being run through a delay, and the controls should seem familiar to anyone who's used an Attack/Release generator and a delay unit.


  • Attack Knob - This sets the time it takes for the output to reach it's peak point (5Volts or -5Volts).
  • Decay Knob - This knob sets how long it takes for the output to reduce back to zero volts after the output has reached it's peak and the input Gate signal has gone back to zero.
  • Delay Time Knob - This sets how long until a new attack is set into motion after going into decay. Because the delay timer starts at the beginning of the decay phase, this control is interactive with both the Attack Knob and how long gates are being held down.
  • Repeats Knob - This sets how much the delayed envelopes are reduced each time they repeat themselves. When set fully counterclockwise there should be no repeats.
  • Delay Level Knob - This attenuates the maximum signal size of the delayed envelopes.
  • Gate Switch - This toggle sets whether the unit recognizes the time of the input pulses used or if it treats all inputs as if they were extremely short.
  • Reset Switch - This toggle sets whether or not when entering an attack phase the output first goes to zero volts. Not resetting can result in a smoother sound, while resetting can provide a more consistent sound.


  • Gate Input - The gate or trigger signals should be inputted here.


  • Non Inverting Output - This output peaks at +5V
  • Inverting Output - This output peaks at -5V
Additional Information
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Brand Barton Musical Instruments
Additional Resources Build Guide

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