Electronic musical instrument, musical sound generating method of electronic musical instrument, and storage medium

A method performed by an electronic musical instrument that includes:

• a memory that stores, before performance of a musical piece on the electronic musical instrument by a performer begins, pitch variation data that represents differences between fundamental tone frequencies of notes in a melody of the musical piece and fundamental tone frequencies of notes in prescribed singing voice waveform data, the prescribed singing voice waveform data representing or simulating a singing voice that is generated when a person actually sings the melody of the musical piece, and a plurality of pieces of amplitude data that represent characteristics of the singing voice generated on the basis of the prescribed singing voice waveform data and that respectively correspond to a plurality of frequency bands;
• a sound source;
• and
• a waveform synthesizing device,
• the method comprising:
• causing the sound source to output a pitch-adjusted carrier signal generated on the basis of the pitch variation data acquired from the memory and performance instruction pitch data that represent pitches specified by the performer during the performance of the musical piece on the electronic musical instrument, the pitch-adjusted carrier signal being generated even when the performer does not sing after performance of the musical piece begins;
• and
• causing the waveform synthesizing device to modifies the pitch-adjusted carrier signal in accordance with the plurality of pieces of amplitude data acquired from the memory so as to generate and output synthesized waveform data.

A non-transitory computer-readable storage medium having stored thereon a program executable by an electronic musical instrument that includes:

• a memory that stores, before performance of a musical piece on the electronic musical instrument by a performer begins, pitch variation data that represents differences between fundamental tone frequencies of notes in a melody of the musical piece and fundamental tone frequencies of notes in prescribed singing voice waveform data, the prescribed singing voice waveform data representing or simulating a singing voice that is generated when a person actually sings the melody of the musical piece, and a plurality of pieces of amplitude data that represent characteristics of the singing voice generated on the basis of the prescribed singing voice waveform data and that respectively correspond to a plurality of frequency bands;
• a sound source;
• and
• a waveform synthesizing device,
• the program causing the electronic musical instrument to perform the following:
• causing the sound source to output a pitch-adjusted carrier signal generated on the basis of the pitch variation data acquired from the memory and performance instruction pitch data that represent pitches specified by the performer during the performance of the musical piece on the electronic musical instrument, the pitch-adjusted carrier signal being generated even when the performer does not sing after performance of the musical piece begins;
• and
• causing the waveform synthesizing device to modifies the pitch-adjusted carrier signal in accordance with the plurality of pieces of amplitude data acquired from the memory so as to generate and output synthesized waveform data.