The Blues Scale is a hexatonic scale, which means it has six notes. Essentially, the Blues Scale is a Minor Pentatonic with the addition of a ♭5th interval in between its 4th and 5th degrees. The ♭5 goes by many names, including blue note, tritone or, more sinisterly, diabolus in musica, which translates as the ‘devil in music’. Its addition adds a certain amount of tension and colour to the existing Pentatonic scale, creating a familiar yet distinctly different sound.
When using this scale, the phrasing is very important. For example, landing on and sustaining the ♭5 can create a clash with the harmony. Several players, including Dimebag Darrell, do this intentionally in their playing to create this dissonance. However, for the most part, the ♭5 is used as a…
