Hello, Suddenly this music recording bug has bit me and I want to record the songs that I play in my group. I'm not interested to edit the songs but just to record them for future reference and hopefully it will be fun as well. Now should I buy an audio interface or a mixer to record with 13" MBP? I need at least 4 mic inputs and the interfaces are all costing more than $400. So I'm thinking if I should buy a mixer to record the song. Please suggest.