Harmony

thumb|A bar from Johann Sebastian Bach|J. S. Bach's [[Fugue No. 17 in A-flat, BWV 862, from The Well-Tempered Clavier (Part I), an example of counterpoint. The two voices (melodies) on each staff can be distinguished by the direction of the stems and beams.thumbthumb|Voice 1thumb|Voice 2thumb|Voice 3thumb|Voice 4]]

thumb|right|upright=1.35|Barbershop quartets, such as this US Navy Band ensemble, sing four-part pieces, made up of a [[melody line (normally the lead) and three harmony parts. ]] In music, harmony is the concept of combining different sounds in order to create new, distinct musical ideas. Theories of harmony seek to describe or explain the effects created by distinct pitches or tones coinciding with one another; harmonic objects such as chords, textures and tonalities are identified, defined, and categorized in the development of these theories. Harmony is broadly understood to involve both a

harmonic set of three or more notes

Polyphony ( ) is a type of musical texture consisting of two or more simultaneous lines of independent melody, as opposed to a musical texture with just one voice (monophony) or a texture with one dominant melodic voice accompanied by chords (homophony).

Tonality is the arrangement of pitches and/or chords of a musical work in a hierarchy of perceived relations, stabilities, attractions, and directionality.

thumb|right|400px|Homophony in Thomas Tallis|Tallis' "[[If Ye Love Me", composed in 1549. The soprano sings the melody (the primary line) while the lower voices fill out the harmony (as supporting lines). The rhythmic unison in all the parts makes this passage an example of homorhythm.File:If ye love me.ogg]] In music, homophony (;, Greek: , homóphōnos, from , homós, "same" and , phōnē, "sound, tone") is a texture in which a primary part is supported by one or more additional strands that provide the harmony. One melody predominates while the other parts play either single notes or an elaborat

thumb|A series of arpeggios in J. S. Bach's "Jesu, Joy of Man's Desiring" [[File:Bach Arpeggio.mid|400x400px]] thumb|"The Star-Spangled Banner" opens with an arpeggio.[[File:The Star-Spangled Banner arpeggio.mid]] thumb|upright=2|Arpeggios open Beethoven's "Moonlight Sonata" and continue as accompaniment[[File:Beethoven piano sonata 14 mvmt 1 bar 1-4.mid|500x500px]]

relationship among the 12 tones of the chromatic scale, their corresponding key signatures, and the associated major and minor keys; geometrical representation of relationships among the 12 pitch classes of the chromatic scale in pitch class space

transition where a piece of music shifts between keys

thumb|350px|This melody for the traditional song "Pop Goes the Weasel" is monophonic as long as it is performed without chordal [[accompaniment. ]]

book by Johannes Kepler

succession formed by the repetition of a melodic or harmonic motif at a higher or lower degree

immediate restatement of a motif at a higher or lower pitch in the same voice

musical term with meanings with respect to intervals, chords, voices, and melodies

major and minor scales with the same tonic

type of dissonance in polyphonic music

property of keys, scales, chords and music pieces

shortest idea in music, a short succession of notes

thumb|350px|right|Harmonised C major scale : I, ii, iii, IV, V7, vi, vii.

second inversion of the major triad

Balinese philosophy of harmony

harmonic theories used in jazz

movement of two melodic lines with respect to each other

mathematical characterization of the harmonic complexity of music; way of characterizing the harmony found in a piece or genre of music, or the harmonies that can be made using a particular scale

chord formed by the root note, the third part of the same and a perfect fifth

Method of musical harmonization

terms in music theory to characterize scales

in classical music, the parallel movement of two or more lines

intersection of melodic lines in a composition