In a manner that opposes, lacks, or contradicts musical qualities or principles.
From antimusical (opposed to music) + -ly (adverbial suffix from Old English). The -ly suffix transforms adjectives into adverbs describing how an action occurs.
When a singer performs 'antimusically'—like Laurie Anderson or some experimental vocalists—they're using their voice to challenge our expectations about what the human voice should do, making us hear sound in completely new ways.
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