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harmonizer

British  
/ ˈhɑːməˌnaɪzə /

noun

  1. a person skilled in the theory of composition of harmony

  2. a device that electronically duplicates a signal at a different pitch or different pitches

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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He was a big fan of the Eventide Harmonizer, an effects-processor used to add delays and reverb.

From The Guardian • Dec. 11, 2012