The point of change in the quality of tenor, alto, and soprano voices (a genuine bass has no break). The lower range is called voce di petto or chest voice, the upper, voce di testa or head voice. In a properly trained voice, the break should be practically imperceptible.In the clarinet, flute, recorder, or other wind instrument, the place between the lower register of the instrument and the higher. For example, the break on the clarinet is between B-flat and B-natural in the treble clef.An imperfectly formed tone on the horn, trumpet, or clarinet.