modulate to a key

modulate to (some other) key

To transition from one musical key to another. The skilled composer can modulate to a higher or lower key without the listener even noticing.
See also: key, modulate, to
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

modulate to a (different) key

to change from one musical key to another by means of a musical transition. Suddenly, the organist modulated to a key that was too high for most of the singers. I will have to modulate to a lower key before I start the next hymn.
See also: key, modulate, to
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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