I don’t want to be a music major, but I want to keep playing violin in an orchestra. Can I join the school’s orchestra without majoring in music?
Depends on the school. In most schools, you will be able to join without problems. Some might make you audition, but will not consider your major as a factor. Other schools, especially the large universities, have majors-only ensembles and a more “community” orchestra open to non-majors. You should have no trouble joining an orchestra, but your options may be slightly limited depending on the school.