An electronic musical instrument that includes an input means for inputting first performance data from a first performer side and a second performance data from a second performer side, wherein the input includes at least pitch information, query performance data and response performance data. A mode switch is for switching between a first mode and a second mode. The first mode uses the first performance data as the query performance data, and the second performance data as the response performance data. The second mode uses the second performance data as the query performance data, and the first performance data as the response performance data. A condition determination at least determines whether the response performance data matches the query performance data. A controller automatically operates the mode switch based on the condition determination. The musical instrument enhances learning musical tone discrimination via a game like interaction.