The Venetian School is important mainly for its innovations and progressive tendencies, which paved the way for the 17th century. Among the contributions are 1) Willaert's chromaticism and freer use of modulation, 2) the toccata style of A. Gabrieli, 3) Vicentino's daring speculations and experiments with microtones, 4) Zarlino's investigations of just intonation, dualism, and, to some extent, equal temperament, and finally -- and most important -- 5) Giovanni Gabrieli's magnificent "Venetian style" with its broad masses of sound, polychoral treatment, echo effects, and progressive use of instruments, winning him the name "father of orchestration."