Patent ID: 7825320

Claim:
An electronic keyboard musical instrument for assisting in improvisation comprising: a musical keyboard including white keys and black keys; an input note acquiring device for acquiring input note data representing notes input by a number of keys simultaneously depressed in the keyboard; a key pattern judging device, provided with a number of predetermined patterns of depressed keys, for judging which of the patterns the simultaneously depressed keys exhibit based on the acquired input note data; a harmonization type determining device, provided with a number of types of harmonization, for determining a type of harmonization from among the provided types of harmonization for the notes of the depressed keys based on the judged patterns of the depressed keys, each type of harmonization determining chord notes for the type of harmonization; and a note adjusting device for adjusting the input note data to chord data which represent chord notes as determined by the type of harmonization, wherein the types of harmonization correspond to different types of chord.