F# Blues scale
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The F# Blues scale has the formula 1, b3, 4, #4, 5, b7 with notes F#, A, B, C, C#, E
The blues scale is a six note scale, built by taking the minor pentatonic scale and adding one chromatic flat 5th note, which gives it its characteristically bluesy sound. It is often perceived as sounding soulful and melancholic, and is used across blues, soul, jazz, funk, and rock.