They build and eventually resolve a palpable musical tension, evident through the movement of keys.
The grandeur and vastness of the musical numbers are refined to diminish the monotony and vexation of long dialogues and to further express the various emotions at play here. Mozart had adopted a more classical style of music, with several sections of the opera resembling a “Sonata.” They build and eventually resolve a palpable musical tension, evident through the movement of keys. He successfully synthesized symmetrical resolution with a dose of accelerated complexity - making it the dramatic equal of the original play, and in several respects superior.