Product Overview
Overview
The Dengenerator was created with envelope driven modulation in mind. The delay circuit itself is pretty straight-forward and the real fun is in modulating that delay with picking dynamics. A simple “sound to light” style circuit was utilized via an LM386N-3. This lights up an LED in proportion to the input amplitude. The brightness of this LED controls a light dependent resistor which runs parallel to the “stopper resistor” of the delay control. I chose this over modulating the entirety of the delay range to keep the modulation subtle and controlled. However, you can get some neat pitch bending
when the Bloom control is cranked. Additionally, there are two clipping diodes in the repeat path to clamp self-oscillation so the volume doesn’t get out of control. It has the added benefit of adding a bit of “tape saturation” effect at high repeat settings.
On its own, this PT2399 delay is very sweet sounding and will mix well with other instruments/band volumes. With the modulation feature, it is smack...chef’s kiss!
Controls
• DELAY: The delay range is around 50ms to 600ms.
• RPT: Delay repeats from 1 to “infinity” or self-oscillation.
• MIX: Delay signal volume.
• TONE: CCW: treble roll-off on the delayed signal. CW: full brightness.
• BLOOM: Sensitivity of the envelope driven modulation. CCW: no modulation. 9-12, subtle
“blooming” effect on the delay. 12-CW: pitch bends on the delay (up to 1/2 step down or more).
• FDBK: This trimmer sets the upper limit of delay repeats. Adjust to taste.
