1exert a modifying or controlling influence on:the state attempts to modulate private business’s cash flow
2vary the strength, tone, or pitch of (one’s voice):we all modulate our voice by hearing it
alter the amplitude or frequency of (an electromagnetic wave or other oscillation) in accordance with the variations of a second signal, typically one of a lower frequency:radio waves are modulated to carry the analogue information of the voice
[no object] Music change from one key to another:the first half of the melody, modulating from E minor to G
[no object] (modulate into) change from one form or condition into (another):the fraught silence would modulate into conciliatory monosyllables
