According to one aspect, there is an electronic musical instrument including operators which includes a first operator corresponding to a first pitch and a second operator corresponding to a second pitch, and a sound source configured to generate a first output signal from a first close loop and a second output signal from a second close loop, to generate an integration signal, and return a subtraction signal, the subtraction signal being obtained by subtracting a signal circulating through the first close loop from the integration signal, to the first close loop, and then output a musical sound signal including signal components corresponding to the second pitch as a musical sound signal corresponding to the first pitch.

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.

An electronic keyboard musical instrument includes a sound source configured to, in response to detection of key-pressing of the first key in damper-off detection, input first excitation signal data corresponding to the first key to a first channel, input first channel output data which is output from the first channel to each of low-register channels corresponding to the respective low-register keys, and output musical sound data which is generated based on respective pieces of low-register channel output data which is output from the respective low-register channels and the first channel output data, as musical sound data corresponding to the first key.

According to one aspect, there is an electronic musical instrument including operators which includes a first operator corresponding to a first pitch and a second operator corresponding to a second pitch, and a sound source configured to generate a first output signal from a first close loop and a second output signal from a second close loop, to generate an integration signal, and return a subtraction signal, the subtraction signal being obtained by subtracting a signal circulating through the first close loop from the integration signal, to the first close loop, and then output a musical sound signal including signal components corresponding to the second pitch as a musical sound signal corresponding to the first pitch.

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.

An electronic musical instrument uses a mouthpiece model that models a mouthpiece as a three-dimensional shape having one end at which the mouthpiece is to be held in a mouth of a performer being smaller than another end. A processor in the instrument calculates a reflection coefficient of a progressive wave and a regressive wave using the mouthpiece model by calculating a wave impedance for the progressive wave and calculating a wave impedance for the regressive wave, and generates a musical sound signal on the basis of the calculated reflection coefficient, which is then outputted to a sound generator for sound production.