The choral society Quadriclavio, founded in 1995 by Francesco Scognamiglio and since 1998 conducted by Lorenzo Bizzarri, is a polyphonic choir formed by lovers of sacred and Baroque music who needn't anyway necessarily read music.

The single parts actually are recorded on tapes, that become the singer's groundwork for studying and learning by heart the melody written in the part.

The choir meets for rehearsal only once a week.

Even though it is formed by amateurs, the choir performes high-...