An electronic musical instrument includes a memory storing a musical piece data that includes a first note or chord to be played by the performer at a first timing, a second note or chord to be played by the performer at a second timing, and a third note or chord to be played by the performer at a third timing and a processor that determines a target melodic interval direction from the first note or chord to the second note or chord, and that causes an automatic accompaniment to output from the second timing to a point in time immediately prior to the third timing even if the performer performs a wrong note as the second note as long as a melodic interval direction actually performed by the performer matches the target melodic interval direction.