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The blue notes allow for key moments of expression particularly during the cadences, melodies, and embellishments of the blues. Where the three line verses end, for example, there is a falling cadence that approaches just shy of the tonic, merely suggesting it, and combining the falling of a speaking voice with the shape of the blues scale in a unique, expressive way. This melodic fall, placed at the turnaround (end of the verse), is employed most clearly in the modern, Chicago blues sound. A similar sound occurs in gospel and R&B but not to the same effect, where it is usually termed a melisma.
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