Performance system, performance mode setting method, and performance mode setting device

A performance mode setting method that is achieved through a computer, comprising:

• determining whether a plurality of receivers, each receiver of the plurality of receivers having at least a receiving function, is connected to a secondary unit that is in communication with an electronic musical instrument that is configured to be set to a first mode corresponding to performance by a single individual and a second mode corresponding to performance by a plurality of individuals;
• setting the electronic musical instrument to the second mode upon a determination that the plurality of receivers is connected to the secondary unit;
• and
• transmitting, from the secondary unit to a primary unit, a notification that the second mode has been set, upon the determination that the plurality of the receivers is connected to the secondary unit.

A mode setting device, comprising:

• a connecting portion, configured to connect to one receiver or a plurality of receivers, each receiver of the one receiver or the plurality of receivers having at least a receiving function, provided in an electronic musical instrument that can be set to a first mode that enables performance of the electronic musical instrument by a single individual and a second mode that enables performance of the electronic musical instrument by a plurality of individuals;
• a processor configured to execute computer-executable instructions that cause the mode setting device to perform a plurality of functions including:
• determining whether the plurality of the receivers is connected to the connecting portion;
• setting the electronic musical instrument to the second mode upon a determination that the plurality of receivers is connected to the connecting portion;
• and
• transmitting a notification that the electronic musical instrument has been set to the second mode to an external device that monitors the performance of the electronic musical instrument.