Electronic keyboard musical instrument for assisting in improvisation

A non-transitory computer readable storage medium storing a computer program executable by a computer coupled to a musical keyboard including white keys and black keys and functioning as an electronic keyboard musical instrument, the computer program containing instructions for:

• acquiring input note data representing notes input by a number of keys simultaneously depressed in the keyboard;
• providing a number of predetermined patterns of depressed keys;
• judging which of the provided patterns the simultaneously depressed keys exhibit based on the acquired input note data;
• providing a number of types of harmonization;
• 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
• 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.

An electronic keyboard musical instrument for assisting in improvisation comprising:

• a musical keyboard including white keys and black keys;
• a chord progression providing device for providing chord progression data;
• 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 chord change table for changing the chord progression data to represent another chord which matches the judged depressed key pattern;
• and
• a note adjusting device for adjusting the input note data to chord data which represent chord notes as represented by the changed chord progression data.

A non-transitory computer readable storage medium storing a computer program executable by a computer coupled to a musical keyboard including white keys and black keys and functioning as an electronic keyboard musical instrument, the computer program containing instructions for:

• providing chord progression data;
• acquiring input note data representing notes input by a number of keys simultaneously depressed in the keyboard;
• providing a number of predetermined patterns of depressed keys;
• judging which of the patterns the simultaneously depressed keys exhibit based on the acquired input note data;
• changing the chord progression data to represent another chord which matches the judged depressed key pattern;
• and
• adjusting the input note data to chord data which represent chord notes as represented by the changed chord progression data.