Optical Fiber Speckle-Based Musical Interface

Abstract

This paper demonstrates a simple piano-inspired interface to play a full C major scale based on a optical fiber specklegram quasi-distributed sensor. The user inputs musical notes via foam pads over one multimode optical fiber connected to a laser source and a webcam. Correlating the reference and immediate specklegrams retrieves the note input, subsequently played via audio output connected to the webcam. The interface is demonstrated with a precision of ~0.94 % for eight musical notes plus a neutral state and does not depend on the input order.