You must sing your part (Basses sing bass line, Sopranos sing soprano line, etc.) for the chorale How Beauteous is the Morning Star (Wie Schön Leuchtet der Morgenstern).  At the audition, you will sing along with the MIDI recording that is offered to you in preparation for the audition.  What you are offered is exactly what you will use in the audition.  

Wie Schon Leuchtet - Bass Part

Wie Schon Leuchtet - Tenor Part

Wie Schon Leuchtet - Alto Part

Wie Schon Leuchtet - Soprano Part

MCC Vocal Music