Electronic musical instrument, electronic musical instrument control method, and storage medium

A method of controlling an electronic musical instrument that includes an operation unit that receives a user performance and at least one processor, the method comprising, via the at least one processor:

• in accordance with a user operation specifying a chord on the operation unit, obtaining lyric data of a lyric and obtaining a plurality of pieces of waveform data respectively corresponding to a plurality of pitches indicated by the specified chord;
• inputting the obtained lyric data to a trained model that has been trained and learned singing voices of a singer so as to cause the trained model to output acoustic feature data in response thereto;
• synthesizing each of the plurality of pieces of waveform data with the acoustic feature data outputted from the trained model so as to generate a plurality of pieces of synthesized waveform data corresponding to the plurality of pitches of the specified chord and the lyric;
• and
• outputting a polyphonic synthesized singing voice based on the generated plurality of pieces of synthesized waveform data.

A non-transitory computer-readable storage medium having stored thereon a program executable by at least one processor in an electronic musical instrument that includes, in addition to the at least one processor, an operation unit that receives a user performance, the program causing the at least one processor to perform the following:

• in accordance with a user operation specifying a chord on the operation unit, obtaining lyric data of a lyric and obtaining a plurality of pieces of waveform data respectively corresponding to a plurality of pitches indicated by the specified chord;
• inputting the obtained lyric data to a trained model that has been trained and learned singing voices of a singer so as to cause the trained model to output acoustic feature data in response thereto;
• synthesizing each of the plurality of pieces of waveform data with the acoustic feature data outputted from the trained model so as to generate a plurality of pieces of synthesized waveform data corresponding to the plurality of pitches of the specified chord and the lyric;
• and
• outputting a polyphonic synthesized singing voice based on the generated plurality of pieces of synthesized waveform data.