"Pentatonics" redirects here. For the a cappella group and their 2015 album, see Pentatonix and Pentatonix (album). The first two phrases of the melody from Stephen Foster's "Oh! Susanna" are based on the major pentatonic scale[1] A pentatonic scale is a musical scale with five notes per octave, in contrast to heptatonic scales, which have seven notes per octave (such as the major scale and minor