Chelsea asked me to redesign a prototype she had made which was not producing the level of vibration required for the piece. Additionally, her model was being run off of a laptop. The fundamental flip I preformed was to move the transducer from vibrating the piece as a whole to the transducer vibrating the pen on a sheet metal arm. The gaming transducer receives input from a usb microphone run through a raspberry pi which remaps the frequency to the highest amplitude range of the transducer.
I created the above proof of concept by just throwing wood together and powering the traducer at various frequencies off my laptop. Then I drew up the contraption in CAD and produced the parts on a CNC mill, 3D printer, handcut sheetmetal, and a laser cutter. At the end, I stained it and programmed the raspberry pi to match the frequency of Chelseas singing voice.