Real-time, ultra-low-latency audio and sensor processing system for BeagleBone Black
 All Classes Files Functions Variables Typedefs Macros Groups

Trill Bar Multitouch Theremin

This example shows how to communicate with the Trill Bar sensor using the Trill library. Each touch on the sensor controls the pitch and volume of an oscillator.

The Trill sensor is scanned on an auxiliary task running parallel to the audio thread and the number of active touches, their position and size stored as global variables.

Position and size for each touch are then mapped to frequency and amplitude of their corresponding oscillator. Changes in frequency and amplitude are smoothed using LP filters to avoid artifacts.