A contralto is a type of classical female singing voice whose vocal range is the lowest female voice type. The contralto's vocal range is fairly rare; similar to, but different from the alto, and almost identical to that of a countertenor. The contralto singing voice has a vocal range that lies between the F below "middle C" (F3) to two Fs above middle C (F5) and is the lowest type of female voice. In the lower and upper extremes, some contralto voices can sing from two Bs below middle C (B2) to two B♭s above middle C (B♭5).
The Four Seasons (Italian: Le quattro stagioni) is a group of four violin concerti by Italian composer Antonio Vivaldi, each of which gives musical expression to a season of the year.
