modulate

Definition (verb): change the key of, in music

Example: modulate the melody

Definition (verb): vary the pitch of one’s speech

Definition (verb): fix or adjust the time, amount, degree, or rate of

Example: regulate the temperature

Definition (verb): fix or adjust the time, amount, degree, or rate of

Example: modulate the pitch

Definition (verb): adjust the pitch, tone, or volume of

Definition (verb): vary the frequency, amplitude, phase, or other characteristic of (electromagnetic waves)