The blues guitar scales are really based off of the pentatonic scales with one extra note added. We call that extra note the “blue note” because it gives the pentatonic scale its obvious “bluesyness.” The only real difference between the scales on the guitar and the same scales on any other instrument is the fact that there is more than one way to play them on a guitar. This is due mostly to the fact that the guitar is a stringed instrument and there are at least 3-5 ways to play any unique note.

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