Did you mayhaps mean microtonal?
- microtonal + -ism (Wiktionary)
“Solo singer/keyboardist Berkson is an absorbing one-off – touching on Jewish liturgical music (she's also a cantor), standards jazz tempered by Schoenbergian melody, Debussy, Charles Ives and the microtonalism she learned at the New England Conservatory with the late Joe Maneri.”
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