SK1 to modular synth

YouTube via bubagoo
"Sorry this isn't a very good video, but it shows a really cool module I'm working on. The drum beat is coming from a Casio SK1 keyboard. The Melody is coming from my modular synth. The opening shot is an external audio signal processor that I built on a bread board. I have since built this into a full module which I will post on my site as soon as I have time. I am feeding the drum beat from a casio SK1 keyboard into the circuit. The circuit is then outputting clock pulses triggered by input volume spikes. I am using these clock pulses to control the modular synthesizer. It's a pretty cool way of syncing up your synth to a drum beat."