A good vocal coach is part of an opera singer's essential armour, and they don't come any more distinguished than vincenzo scalera, who is taking fan and brayan through one of opera's best loved duets. a vocal coach is normally a pianist who prepares the students to learn the music, and then we talk about the characters in the operas. we correct the mistakes, perfect the musical part, basically. and of course we work on the phrasing, dynamics, working on diction also. many things that have to do with an opera. they have just met in the first scene, and we are starting just now... you have to r...