Transcription: At the heart of the disc is the concert hall which holds 56 minutes of great recordings by legendary singers such as Luciano Pavarotti, Maria Callas and Dame Janet Baker. In the dressing rooms you can call up exclusive interviews with famous personalities of the singing world such as Dame Joan Sutherland. In the laboratory you can discover the technical and physiological properties of the voice. The practice room allows you to eavesdrop on a singing lesson for each of the main voices including sopranos and tenors. But these are only a few of the Academy's rooms.