Looks like OU limits the choices that she has for general education courses.
https://ou.edu/content/dam/CoE/CBME/Documents/Undergraduate/Flowchart-B%20160-Standard.pdf lists the following non-technical courses (AP credit at https://www.ou.edu/content/admissions/apply/transfer-credits/advanced-placement.html ; list of qualifying courses at https://www.ou.edu/content/dam/gened/documents/cores.pdf ):
ENGL 1113 (3 on AP English may satisfy)
ENGL 1213 (5 on AP English may satisfy)
HIST 1483 or 1493 (4 on AP US history may satisfy)
Political Science 1113 (3 on AP US government may satisfy)
Social science elective (4 on AP economics or 3 on AP psychology may satisfy)
Artistic forms elective (some music courses may be used)
Western civilization elective (some music courses may be used)
Non-western civilization elective (some music courses may be used)
If she has applicable AP credit, she may gain additional schedule space to take more music electives instead of the specified general education courses.