I plan on majoring in audio engineering, is there an SAT Subject Test that will help me get into a good program?
Any audio engineering program that requires (or even recommends) an SAT subject test will almost certainly want you to take the Math Level 2 subject test. Whether or not you need to take subject tests (and if so, how many) will differ from program to program, but if the audio engineering program is part of a school of engineering (or is an interdisciplinary program that requires applying to multiple schools within a university, as at Carnegie Mellon), it might also help your application to take (and do well on) the SAT Physics subject test.