TREBLE
Text: (1) The highest vocal or instrumental part, sung by women or boys, or played by violins, flutes, oboes, clarinets, or other instruments of acute tone. (2) The treble or soprano voice is the most flexible of all vocal registers, its ordinary compass is from middle C upwards to the extent of a twelfth, its exceptional range a fifteenth, or even beyond this.
See Also: TRIPLEX
Source: 125