You also have to get a feed from the existing sound system assuming you're not setting microphones out yourself. Audio (and video) shows are very large and if you're accustomed to rock and roll downloads or YouTube videos, this is going to be a nasty shock. The hard drive still has to be roomy enough to store a show. Your computer still has to be able to handle the stress of audio recording and playback - at the same time. There's no shortage of people who want us to guarantee perfect shows if they buy certain hardware and connect it a certain way.
