Meaning : A musical passage moving from one key to another.

Meaning : (electronics) the transmission of a signal by using it to vary a carrier wave. Changing the carrier's amplitude or frequency or phase.

Meaning : Rise and fall of the voice pitch.

Meaning : A manner of speaking in which the loudness or pitch or tone of the voice is modified.

Meaning : The act of modifying or adjusting according to due measure and proportion (as with regard to artistic effect).