I think the original question refers to the overall melodic theme of the davening for the yomim noraim where the same melody line with the minor chords creating an ominous feeling and growing crescendos leading up to the end of the paragraph. I sometime think of musical score that is programmed to a great movie and think that hundreds of years ago (or much longer if these melodies go back to the avodah during the z’ma beis hamikdash ) that the nigunim were deliberately meant to reinforce the emotional feelings we experience while davening alternating between fear, awe, supplication and solace.
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