keys
NOUN
Music
1. A button or lever that is depressed with the finger to produce or modulate the sound of an instrument, such as a clarinet or piano.
2. A tonal system consisting of seven tones in fixed relationship to a tonic, having a characteristic key signature and being the structural foundation of the bulk of Western music; tonality.
3. The pitch of a voice or other sound.
4. A characteristic tone or level of intensity, as of a speech or sales campaign. Often used in combination:high-key; low-key.