In many ways, becoming a music major or a theatre major at Iowa State are very similar. You will need to apply and be accepted to Iowa State. You can find a link to that application here: https://www.admissions.iastate.edu/apply/online/
For prospective music majors, in addition to the Iowa State application, you will also need to audition for the program. You can find a link with more information about the audition process here: https://app.getacceptd.com/iastate
Music auditions are held in mid February and are based on ability and availability in a studio. Please do not hesitate to contact the applied professors of your area for more detailed information regarding your audition.
All music majors are required to take a music placement exam in August prior to the start of the academic year.