According to the present invention, there is provided an electronic musical instrument, comprising: a plurality of keys; a memory that stores each pattern data showing a combination of a plurality of pitches that comprises a consonance; a speaker; and a processor that executes the following: determining processing for determining whether a combination of the operated keys matches any of the pattern data stored in the memory, first outputting processing for outputting a first sound, when the combination of the operated keys matches any of the pattern data, and second outputting processing for outputting a second sound, when the combination of the operated keys does not match any of the pattern data.