I applied through my college career website. They were looking for someone who wanted to learn and get experience. After applying, I received an email requesting a phone interview. The interview was more explaining what the position was, what you wanted to get out of it, career goals, etc. Knowing a little about the professional audio market helps but isn't necessary. If you want to get some experience, you will get the position. You will start out as a volunteer and if it is going well, they will compensate you.