Scale

A musical scale is a sequence of notes ordered by pitch over an octave. Scales in higher or lower octaves mirror the sequence at higher or lower pitches. There are many types of scales and variations thereof. The most commonly used scale type in Western music is a Heptatonic scale which, as the name suggests, splits the octave into 7 notes. Similarly a Pentatonic scale splits an octave into 5 notes and is commonly used in Eastern music.