hexachord

thumb|A hexachord originating on C. A hexachord is a collection of six musical notes. The term derives from the Greek word , a compound of ἕξ (hex, six) and χορδή (chordē).

==Usage== Since the 11th century, hexachords have been used in music pedagogy. Guido of Arezzo is the nominal creator of a learning system that relied on a six-note scale to facilitate rapid learning of melodies. Hexachord also could refer to the musical interval of a sixth.