Scale (music)

In music, a scale is a collection of musical notes that provides material for part or all of a musical work. Scales are ordered in pitch or pitch class, with their ordering providing a measure of musical distance. Scales differ from modes in that scales do not have a primary or "tonic" note. Thus a single scale can have many different modes, depending on which of its notes is chosen as primary. The distance between two successive notes in a scale is called a "scale step." Composers often transform musical patterns by moving every note in the pattern by a constant number of scale steps: thus, in the C major scale, the pattern C-D-E ("doe, a deer") might be shifted up a single scale step to become D-E-F ("ray, a drop"). This process is called scalar transposition. Since the steps of a scale can have various sizes, this process introduces subtle melodic and harmonic variation into the music. This variation is what gives scalar music much of its complexity.
See more at Wikipedia.org...