In music, modal refers to the seven modes of the standard Western major scale: ionian, dorian, phrygian, lydian, mixolydian, aeolian, locrian. The term modal is often used to describe a particular style of jazz composition in which relatively few chords are used. A soloist is then challenged to keep up a melodically interesting improvisation over the long duration of a single chord. The classic example is perhaps the first modal jazz tune: So What, composed by Miles Davis and recorded on his Kind Of Blue album.