4015 R 2 R 4069 Distortion

YouTube via wonkythomas

"My 4015 Lunetta Shift Register feeds a crude 2 input R2R network. A simple glide cct. smears the CV before it hits the Bi-N-Tic V/Octave input.

The 4015 & R2R network make a great sequencer. I am using 2 40106 clocks, 4024 Divider & 4017 Decade Counter to step the Shift Register, feed the Data input (High or Low) & the reset input. Even tho the 2 input R2R can only produce a handfull of notes by varying the inputs into quite a nice, varying pattern is generated. I think The final R2R module will be 4 input with the Range pot which controls how much voltage is pased thru the op-amp & a simple Lag / Glide generator using the other half of the Dual op-amp package. The simple lag will have its I/O brought out to the panel rather than being hard wired to the R2R.

A distortion & filter (tone control really) based on the Bug Brand Workshop Oscillator Machine dirtys (!?!) up the Bi-N-Tic. This is a really simple, but really, really nice design. I have made 3 changes to the cct. just to customize it to my purposes.

I plan to build this into a Lunetta module first, but it sounds so good it may end up adapted into a 'proper' Frac unit as well as its a very differant sound to the CGS Wave Folders / Multipliers I already have. Seeing as how the cct. only uses 2 of the 6 gates on the 4069 chip its a very economical module :-D

Its a very messy breadboard of two potential modules! I am trying out a demo of the LochMaster 3.0 stripboard layout program so hopefully tomorrow I'll build the 4069 Hex Distortion Module."