<p>Concert Orchestra is the one that is opened to anyone. I did it this past semester, so I can answer some questions. We do 1 concert each semester, and then the class is over after that (usually 1-2 weeks before finals start). So there is no final for the class which is nice. String players DO NOT have to audition, everyone is accepted. However, if you want to be 1st chair, then you do have to audition. However, band players have to audition. The only exception is if there are not enough players for a section (ie if only 2 flutes sign up, then there are no auditions, but if there are 10, then you will have to audition).</p>