B.A. music programs tend to be broad in scope and offer courses in theory, performance (in a variety of styles), conducting and composition. With a major, you could elect to emphasize the areas of greatest appeal to you without the necessity of an added music minor. These sites will give you an idea of what a B.A. music curriculum might look like:
http://www.kenyon.edu/academics/departments-programs/music/academic-program-requirements/courses/
https://www.hamilton.edu/academics/departments/Courses-and-Requirements?dept=music