Last week I received and soldered my RasPiO Analog Zero. I can now have up to 8 sensors wired to my drum module! Here's what the back for the drum module looks like:

I only have 4 sensors right now, so I'm going to use an MCP3204 (tested with the Analog Zero). Two more terminal blocks are going to be soldered to the board in order to get the 5V of the touchscreen board, and the led used in the hi-hat pedal.

That will give us a prototype with a hi-hat (pedal + cymbal = 2 sensors), a snare drum, and a bass drum, which will be the perfect occasion to design a prototype and start thinking about the hardware (enclosure, making drums and cymbals, etc...).