The Devil´s Chalkboard consists of two identical units used for transposing octaves by rotary switches. It can work by itself as a fixed voltage generator but you can also process external CVs which will then be transposed. The input voltage is simultaneously availa at a Thru socket for further use. The output voltage is available at two buffered outputs.
The rotary switch allows for a transposition one or two octaves up or down, i.e. a total range of five octaves. The upper input is normalized to the bottom input, for that reasion you can use module even as a buffered 1-6 multiples or as a dual 1-3 multiple.
When cascading both units you can transpose a signal up to 9 octaves.
per sub-unit: one input, one thru, two outputs
3U Eurorack module, 6HP wide, 22mm deep.