Warm up your voice. In the weeks prior to your audition, it is essential that you exercise your voice by singing on a daily basis. One way to accomplish this is by singing songs from the show for which you are auditioning by reviewing its score and listening to recordings of past productions. Take into consideration that each director may have a different interpretation of the score than your own or that of other directors.
Be familiar with the show. Your audition will be more compelling if you have taken the time to research the show and the character for which you are auditioning. Familiarize yourself with the show's plot, its various characters, and your character's physiological and psychological key characteristics. If possible, attend performances of the show and watch any adaptations to film to enhance your perception of the show and how others have played the part for which are you are competing.
Select a suitable song. Your choice of repertoire should showcase the strength and unique qualities of your voice. You may select songs from the show, although directors often tire of listening to the same performances. Another option is to select a song that is similar in style and range as the part for which are you auditioning. You may be asked to perform more than one song in the casting process, so select a number of pieces that demonstrate your abilities in the best light.
Provide appropriately formatted sheet music. Ensure that you bring sheet music for the pieces that you plan to perform. The materials should be written in the correct key and marked clearly for tempo, repetitions and other features. The sheet music should be taped together, rather than bound in the form of a book, to facilitate page turning. Provide the sheet music to the pianist present at the audition and sing a few bars quietly for him to give him a flavor for the tempo.