Information processing device, electronic musical instrument, electronic musical instrument system, and sound production control method

A method performed by a processor configured to be installed in or in communication with an electronic musical instrument having a plurality of performance operators respectively specifying a plurality of pitches, the method comprising:

• if an operation on a first performance operator among the plurality of performance operators is detected while no operation has been performed on any of the plurality of performance operators, and further if an operation on a second performance operator different from the first performance operator among the plurality of performance operators is detected while the operation on the first performance operator continues, causing the a sound generation section to produce sound of a pitch specified by the first performance operator and sound of a pitch specified by the second performance operator with synthesized singing voices of different singers, respectively.

A non-transitory computer readable storage medium storing instructions executable by a processor that is configured to be installed in or in communication with an electronic musical instrument having a plurality of performance operators respectively specifying a plurality of pitches, the instruction causing the processor to perform the following:

• if an operation on a first performance operator among the plurality of performance operators is detected while no operation has been performed on any of the plurality of performance operators, and further if an operation on a second performance operator different from the first performance operator among the plurality of performance operators is detected while the operation on the first performance operator continues, causing the a sound generation section to produce sound of a pitch specified by the first performance operator and sound of a pitch specified by the second performance operator with synthesized singing voices of different singers, respectively.