A minor major seventh
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The AmM7 chord has the formula 1, b3, 5, 7 with notes A, C, E, G#
Matching Scales: A Harmonic MinorA Melodic MinorE PersianE HinduG# PersianG# Jewish
The minor major seventh chord sees the most use in jazz and classical music. Some call it the Hitchcock chord for its use in the score for his 1968 thriller, Psycho.