Modulation (noun)

1. The act of adjusting or altering something, such as the tone or pitch of a sound or the intensity of light.
2. A change or variation in the character or quality of something, especially in music or electronics.

Origin:

From the latin 'modulatio' meaning 'measure, rhythm, melody'.

Examples:

1. The modulation of the singer's voice added emotional depth to the performance.
2. The modulation of the light created a warm, inviting atmosphere.
3. The modulation of the sound was necessary to prevent interference.
4. The modulation of the frequency improved the transmission quality.
5. The modulation of the radio signal allowed for the transmission of data.