Example 12. The row on which Babbitt’s four-lyne all-partiton array is based. Its discrete trichords are two [037] types followed by two [015] types, plus an additional [037] trichord in the second half of the row. Even the [015] discrete trichords in the second half of the row can be voiced as incomplete major 7th chords. (The inversion of the row can also be rendered as “tonal” chords.)