The hexatonic scale is a musical scale that consists of six different notes. It can be thought of as a combination of two smaller, complementary tetrachordal scales. The hexatonic scale is often used in various forms of Western classical music, as well as in blues and jazz. One common example of a hexatonic scale is the whole tone scale, which consists of six notes that are each separated by a whole step. Another common hexatonic scale is the blues scale, which combines the pentatonic scale with an additional note. Hexatonic scales can provide a unique and interesting harmonic structure for compositions and improvisations. They can also be used to create unexpected and surprising chord progressions and chord substitutions.