Patent ID: 7554026

Claim:
A portable electronic device for the production, playing, accompaniment and evaluation of musical sounds, comprising means to be associated to an audio system that produces musical sounds, the electronic device comprising: a processing unit which produces musical instrument sounds, the musical instrument sounds being mixable with the musical sounds, the processing unit comprising a digital signal processor and a microprocessor; touch-sensitive sensors arranged under a translucent touch-sensitive surface, the touch-sensitive sensors being activated by touches of a user and generating signals that are processed by the digital signal processor to produce the musical instrument sounds; the touch-sensitive sensors being arranged under the touch-sensitive surface and providing touch-sensitive regions that are sensitive to touches; and LEDs distributed under the touch-sensitive surface, the LEDs being controlled by the microprocessor to provide a luminous indication sequence according to the musical sounds played by the audio system, the device being configured in such a manner that the luminous indication sequence indicates to the user a spot of the touch-sensitive regions that should be touched as well as the moment the spot should be touched and an intensity with which the spot should be touched.