Text: The distance in pitch between two notes, harmonic if they are played together, melodic if they are played in succession. Perfect i: the prime, fourth, fifth, and octave. Major i: the second, third, sixth, and seventh of the major scale. Minor i: a chromatic half step smaller. Augmented i: a chromatic half step larger than perfect and major. Diminished i: a chromatic half step smaller than perfect and minor.

See Also:

Source: