This is my coke piano/launchpad. I've used an arduino mega and a python script programmed by me, with the PyAudio library. Basically, the launchpad can play any sound loop in .wav, so I added some samples and some piano sounds.
I don't have much time so I didn't prepare a nice mash-up or a dubstep music, this is just for showing the potential of the project.
The hardware (the protoboard with the arduino and components) is made of lots of transistors for 'body signal' amplification, so the coke I touched activates the transistor (BC548B NPN). The cokes are plugged in directly to the transistor's base with an wire. Then the arduino reads the data and sends it via serial to the python script.
(I'll write a tutorial soon)
If you're intersted in more information or projects, visit my website: http://lucaszanella.com
Thank you for my friend who helped me with the musical notes: Gabriel Nardes.
I uploaded the source code here: http://pastebin.com/uN08wXTb