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→Harmony: merge with info from music theory page
===Harmony===
===Harmony===
When two or more notes sound at the same time, it is called a chord, and the distance between the notes is the interval. In the western 12-note scale common usage, an interval is often expressed in relative terms, using the eight notes that make up an octave and prefixing 'major' or 'minor' to account for the interstitial notes. For instance, the interval between 'C' and 'E' is a 3rd because 'E' is the 3rd note in the major scale of C. One-half step below that is a minor 3rd, although this exact same note could also be called a major 2nd.
When two or more notes sound at the same time, it is called a chord, and the distance between the notes is the interval. In the western 12-note scale common usage, an interval is often expressed in relative terms, using the eight notes that make up an octave and prefixing 'major' or 'minor' to account for the interstitial notes. For instance, the interval between 'C' and 'E' is a 3rd because 'E' is the 3rd note in the major scale of C. One-half step below that is a minor 3rd, although this exact same note could also be called a major 2nd.
Harmony is the study of notes which occur together or which are perceived as being together. This usually means notes which are played simultaneously, as in a chord, but can also apply to notes within a melody which outline a chord. The harmony that results from the combination of any two or more notes depends on the interval present between those notes. A system of Roman numerals is the most common means used to analyse harmony.
=== Rhythm ===
=== Rhythm ===