This paper was presented by Matt Wright in 2001 at the ICMC in Havana, Cuba.

This annotated version by Adrian Freed borrows some ideas from medieval glosses. It is intented to provide context and readability unavailable in the original pdf.

Managing Complexity
with Explicit Mapping of Gestures to Sound Control
with OSC

Matthew Wright
Adrian Freed
Ahm Lee
Tim Madden
Ali Momeni

email: {matt,adrian,ahm,tjmadden,ali}@cnmat.berkeley.edu

CNMAT
UC Berkeley
1750 Arch St.
Berkeley, CA 94709, USA

The fast touch algorithm reimplemented in the library available here was developed for my FingerPhone Instrument. The fast touch library senses touch on any digital I/O pin on many embedded controllers with the Arduino IDE. This includes Atmega 8-bit, SAMD21, and Teensy. This includes most pins on most micro-controllers. A few micro controllers have analog input pins that can't also do digital I/O . The library relies on the ability to enable a built-in pull-up resistor on the pin being sensed. Here is the algorithm:

set the pin to output a LOW value for 1uS or so.