"modulates" in the verb sense
1. modulate
change the key of, in music
"modulate the melody"
2. tone, inflect, modulate
vary the pitch of one's speech
3. regulate, modulate
fix or adjust the time, amount, degree, or rate of
"regulate the temperature"
"modulate the pitch"
4. modulate
adjust the pitch, tone, or volume of
5. modulate
vary the frequency, amplitude, phase, or other characteristic of (electromagnetic waves)
Source: WordNet® (An amazing lexical database of English)
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