Yasuhiko Oba

POSITION TRANSDUCER SYSTEM WITH BUILT-IN CALIBRATOR FOR MOVING OBJECT, METHOD FOR ACCURATELY DETERMINING POSITION OF MOVING OBJECT AND KEYBOARD MUSICAL INSTRUMENT EQUIPPED WITH THE POSITION TRANSDUCER SYSTEM

Keyboard musical instrument faithfully reproducing original performance without complicated tuning and music data generating system incorporated therein

Data converter for producing individual music data from standard music data on the basis of the individuality of an automatic player piano learned before conversion

Automatic player piano and estimator for acceleration of depressed key incorporated in the automatic player piano

Keyboard musical instrument equipped with dummy key/hammer event supplementing system

Sound controller incorporated in acoustic musical instrument for controlling qualities of sound

Musical tune playback apparatus

Velocity calculating system for moving object widely varied in velocity method for correcting velocity and keyboard musical instrument equipped with the velocity calculating system for accurately determining loudness of sounds

Acoustic effect controller of musical instrument

Automatic player piano exactly reproducing half stroke in playback