Calibrating the Analog Delay
Adjusting the Maximum Delay Time
Maximum delay time is set using the two blue trim pots mounted on the side of
the module. Maximum delay time can be adjusted from 80ms to around 2
seconds. The modules are shipped with around 9/10ths of a second of delay
when the Rate control knob is turned full clockwise. This setting offers the best
balance between sound quality and long delay time. Setting the maximum delay
time above 1 second will reduce the sound quality of the delayed signal.
As the delay time increases, the delayed signal becomes grainier and more
distorted, also the clock noise will become louder.
The trim pot closer to the top of the module (1) is the main control for setting the
maximum delay length. The second trim pot (2) adjusts the range of the delay
length available from the rate control and also affects the delay length.
Procedure:
First set the Rate control knob to full right. Setting trim pot 2 between 12 o’clock
and 12:30 is a good place to start. Once trim pot 2 is set, adjust trim pot 1 while
listening to the delay time. Start with trim pot 1 set at 12 o’clock. Turning trim pot
1 to the left increases the delay time, turning trim pot 1 to the right decreases the
delay time.
Pittsburgh Modular Analog Delay Manual
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