<p>Some schools list as a prerequisite for graduate study that an applicant hold a BM or equivalent. The devil is in the details of what your background is…theory, music history, piano skills, performance level skills…entrance exams will validate your background or show the deficits which must be addressed. I have had at least four students over the years with non-music undergraduate degrees who entered graduate school in voice. One has a PhD in a science area and returned for an MM program in opera performance. It can be done. However, being a singer does not require that you have any degrees…again the devil is in the details…what kind of voice do you have, how rare, how good is the talent, how well does your voice category (Fach) and body type match up for purposes of opera casting, etc.? Good luck to you.</p>