modulating

[modulate.v.01] as in: change the key of, in music

[tone.v.02] as in: vary the pitch of one's speech

[regulate.v.01] as in: fix or adjust the time, amount, degree, or rate of

[modulate.v.04] as in: adjust the pitch, tone, or volume of

[modulate.v.05] as in: vary the frequency, amplitude, phase, or other characteristic of (electromagnetic waves)

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