Patent ID: 6153822
Filing Date: 2000-11-28
Classification: G10H

Abstract:
An electronic musical apparatus that responds to the motion of an object in a space exterior to the electronic musical apparatus in order to control music outputted by the electronic musical apparatus, the electronic musical apparatus comprising:a musical tone signal generator that generates a musical tone signal;at least one light source that emits at least one light beam into a space outside the electronic musical apparatus where the emitted light beam hits an object in the space;at least one light detector that detects at least two light beams reflected from the object in the space outside the electronic musical apparatus, the light beams traveling along at least two different paths from the light source to the obiect and then to the light detector, the at least one light detector providing at least two detection values, each of which is based on one of the at least two reflected light beams;a computing element that receives the at least two detection values provided by the at least one light detector and computes a synthesized value of the at least two detection values; anda musical tone controller that controls the musical tone signal generator based on the synthesized value.