Modulate

1.

(TRANSITIVE) (To adjust or regulate, to moderate, to vary the tone or pitch of, to vary the amplitude frequency etc., to shift from one key to another within a musical composition) រលាក់សំឡេងឲ្យឡើងចុះជាបទ, និយាយដោយសំឡេងស្រទន់, ប្ដូរតាន
Example: To modulate the voice.

1.

(TRANSITIVE) To form, as sound, to a certain key, or to a certain portion.

2.

(TRANSITIVE) To vary or inflect in a natural, customary, or musical manner; as, the organs of speech modulate the voice in reading or speaking.

3.

(INTRANSITIVE) To pass from one key into another.