Jun Ishii

Musical instrument

Operation detection device for key operation of keyboard device, operation detection method of key operation, and keyboard device

Displacement amount detection apparatus, displacement amount detection method, and manipulation information output apparatus

Audio device including non-contact power feeding mechanism

Circuit and musical instrument

Circuit and musical instrument

Protection apparatus for sound signal converting device

Temperature measurement device and protective device for acoustic signal converter

Temperature measurement apparatus and protection apparatus for sound signal converting device

Pickup device

Keyboard instrument

Synchronous playback system for reproducing music in good ensemble and recorder and player for the ensemble

Battery charger, secondary battery unit and electric apparatus equipped therewith

Ensemble system, audio playback apparatus and volume controller for the ensemble system

Discriminator for differently modulated signals, method used therein, demodulator equipped therewith, method used therein, sound reproducing apparatus and method for reproducing original music data code

Multiplexing system for digital signals formatted on different standards, method used therein, demultiplexing system, method used therein computer programs for the methods and information storage media for storing the computer programs

Information transmission system for transmitting information among terminals different in modulation/demodulation techniques and method used therein

Musical performance apparatus

Measuring device for volume of engine combustion chamber

Method for recording asynchronously produced digital data codes, recording unit used for the method, method for reproducing the digital data codes, playback unit used for the method and information storage medium