This document discusses various musical instruments and technologies, including the Georgia Tech illuminated marimba from 2000 costing $10,000, the Oliver illuminated marimba from 2006 costing $5,000, and the Shell illuminated marimba which features pre-programmed lighting effects. It also mentions the Max/MSP software, Lemur and Eroktronix touchscreen interfaces from 2003, a single-string fretted instrument that can be picked at 1/4 steps, and how the Interlink VersaPad allows control of Max/MSP via its X/Y axes and fingertip pressure input.