A Jewish scale
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The A Jewish scale has the formula 1, b2, 3, 4, 5, b6, b7 with notes A, A#, C#, D, E, F, G
The Jewish scale is also known as the Phrygian dominant scale, since it is similar to the Phrygian scale except with a major 3rd note. It is used in flamenco music, and traditional Jewish music (like the popular song, Hava Nagila).