I'm brand new at home recording, so please, be patient with me. I've been asked to record some guitar and sax tracks into Band Lab, and I haven't the slightest idea of what I need to do so. I have an older laptop running Windows 7. I have a POD HD500, into which I guess I can run both my guitar and a microphone for the sax. Will the HD500 serve as the AI, or do I need to buy an external one?