Black Current Vibrato & Stutter
Here is an original design that I have been working on for some time. It's a combined vibrato and a stutter effect with minimum controls. I'm very happy with the results and I hope you like it. :)
The idea is simple: the signal is split into two paths that are out of phase. One side is goes though a highpass filter (that cuts eveything below about 500hz) and amplitude modulation, then both signals are summed back together. As the two signalpaths partly cancel out from 500hz and up, this creates an interesting phasey sound in the crossover frequencies - a vibrato'ish sound that is a bit different from your standard tremolo.
The stutter mode was added later as an afterthought. The way I set up the VCR (the JFET acting as a voltage controlled resistor) results in a very agressive amplitude modulation, so I wanted to take advantage of that in the design.
6/28/2017 02:28:16 am
Hi, super cool pedal!
12/21/2020 06:27:31 pm
I’ve build some weeks ago the strip board version and didn’t work...... debugging for a while, i didn’t notice bad or missing cuts/ bridges, cap polarities etc etc. ... after a fustration times , i decided go to the pcb etching.... haha i didn’t succeed... after 2 attempts i noticed that my ferric chloride was to weak, as was used several times... so i just got a slight pcb etching... after that I decided to take my dremel rotary tool and follow the marks that the bad etching left and sort of “engrave” the pcb
12/22/2020 05:35:58 am
5/2/2022 05:09:07 pm
Made this on vero, does not work. Not sure if the resistor values above have changed from the diagram as mentioned above. All I am getting is a clean signal through it. Same with your sonic reducer pedal also.
5/3/2022 12:16:27 am
5/3/2022 07:08:21 pm
Ok Thanks very much for the reply - I'll go over to Madbean. I did use a 2N5458 for the transistor on the Vibrato, should be ok same pin out as the J201. The Quantum Defraculator is awesome and I reviewed it on my channel - Unholy Audio.
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