To form, as sound, to a certain key, or to a certain portion.
- To adjust or adapt to a certain proportion; regulate or temper.
- To change or vary the pitch, intensity, or tone of (one's voice or a musical instrument, for example).
- Electronics To vary the frequency, amplitude, phase, or other characteristic of (electromagnetic waves).
- Electronics To vary (electron velocity) in an electron beam.
- Music To move from one key or tonality to another by means of a melody or chord progression.