Novel and Forgotten Current-steering Techniques for Resistive Multitouch, Duotouch, and Polytouch Position Sensing with Pressure

TitleNovel and Forgotten Current-steering Techniques for Resistive Multitouch, Duotouch, and Polytouch Position Sensing with Pressure
Publication TypeConference Paper
Year of Publication2009
AuthorsFreed, Adrian
Conference NameNIME 2009
AbstractThe recent surge in development of multitouch gesture systems focuses around capacitive and optical sensing techniques. Although interesting and widely used by the NIME community, most musical applications of touch benefit greatly from concurrent acquisition of pressure or force at the touch points. Piezoresistive materials have proven the most effective modern choice for this. At least three generations of inventors have developed sensing circuitry for resistive arrays and piezoresistive materials with much duplication of effort along the way. This paper describes the key (and largely forgotten) methods and introduces new higher-performance circuits developed for musical instrument controllers.