The rhythm of the resulting song melody would be identical to the original, correct? You’re doing a vertical mirror image, not a horizontal one?
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BIAB 2022 Win Audiophile. Software: Studio One 5 Pro, Swam horns, Audition, Notion 6; Win 10 64 Pro. Hardware: custom i7 16 Gb; Roland Integra-7, Presonus Studio 192, Presonus Faderport 8, Royer 121, Adam Sub8 & A5X monitors