Abstract: Described herein are techniques for adjusting notes of a first musical piece based on chord data of a second musical piece. A first musical piece is accessed, wherein the first musical piece comprises a plurality of notes. Chord data associated with a second musical piece is accessed. One or more of the plurality of notes are compared to the chord data. An aspect of the one or more of the plurality of notes is changed based on the comparison.

Abstract: An electronic musical instrument includes a playing operator, and a sound source which performs processing of receiving, in response to a user operation on the playing operator, a sound generation instruction according to playing operation information including the pitch information indicating the certain pitch and sound volume information indicating a certain volume, and generating sound according to the certain pitch and the certain volume, based on excitation data generated by multiplying partial data by a window function, the partial data being included in excitation signal waveform data generated based on a plurality of waveform data items which are respectively different from each other in sound intensity in the certain pitch.

Abstract: Electronic guitar including a case, a keyboard, a sound synthesis electronic assembly and an output line. The keyboard is divided into an upper keyboard arranged on a neck of the case and a lower keyboard arranged on a body of the case. The upper and lower keyboards constitute a complex array. When a key on the upper keyboard and a key on the lower keyboard are pressed, a determined note is generated by the sound synthesis electronic assembly and can be output to a karaoke CD player. It is thus possible to play this guitar while singing the karaoke.