Heard about the Toppobrillo Quantimator over the weekend from a fellow modular nut, and wondered if I could write a quantiser from bits of the code and hardware from my still unfinished CSQ-100-ish sequencer project. So ta-da, here’s a demo.

It’s a bit annoying, but you get the idea – the Arduino is taking a random input (from an MFB Dual LFO) and forcing it to the selected key and scale on a trigger from a TR-606.  Hopefully you can tell that it’s displaying the key, scale, incoming CV value and output note value. When I flip the switch down, it stops accepting CV input and starts looping back over the last eight notes quantised.

It should be easy enough to expand the modes available. There’s a good list in this electro-music thread on building a PIC-based quantiser.

I used the second output of the MCP4922 DAC to provide a harmony part (the “h” value on the display), although it’s not attached to a oscillator in this demo. It’s tempting to add another DAC and have four outputs for chords, in the style of the Quantimator. IS FUN.