Here are some replies/answers to questions posed to me:
@Sportsman88 I do not know much about the co-op program at OU. I did co-op assignments when I was an engineering student in the day and hope that my daughter will do the same.
@mathmom I certainly agree internships/co-ops are more important than catching up on classes during the Summer. I expect that my D would use the freshman summer session for study abroad and classes. After that, she should prepare herself for a potentially competitive job search by getting as much summer work experience as possible. All this also depends on applying and interviewing successfully for relevant summer work which can be competitive also.
@JustGraduate The second major is for enjoyment. She tells me her plans are to work as a chemical engineer and find other ways to continue her love of music after college.
@guineagirl96 I think it is a BA since it is not a conservatory. The requirements are just as you stated, 1 hour of voice lessons and a requirement to be in a choir/ensemble each semester. Many of the class requirements are music theory and musicology, but there are some requirements for foreign language diction, piano, recitals, opera, choral conducting, etc. I have no idea how much time these classes require outside of the lecture/professor time.