Four-part harmony is music written for four voices, or for some other musical medium—four musical instruments or a single keyboard instrument, for example—for which the various musical parts can give a different note for each chord of the music.
The four main voices are typically labelled as soprano (or treble and countertenor),[2] alto (contralto, countertenor or mezzo), tenor, and bass. Because the human voice has a limited range, different voice types are usually not able to sing pitches that lie outside of their specific range.[3]
The effort required to perform four-part harmony varies greatly. Pieces written in such a style can be usually executed by a single keyboard player, a group of 4 instruments (or singers), or even a large choir with multiple singers per part.
- ^ Benward & Saker (2003). Music: In Theory and Practice, Vol. I, p.159. Seventh Edition. ISBN 978-0-07-294262-0.
- ^ McKinney, James (1994). The Diagnosis and Correction of Vocal Faults. Genovex Music Group. ISBN 978-1-56593-940-0.
- ^ Boldrey, Richard (1994). Guide to Operatic Roles and Arias. Caldwell Publishing Company. ISBN 978-1-877761-64-5.