I have a standard Macbook Pro with no line in jack on the side ( just headphones ) It has garageband as well, but would the best option be just getting an audio interface for this? I don't have that direct line in, but does this even matter? I am very new to this so anyone who can point me in the right direction, it would help a-lot! Don't want anything TOO serious, but any recommendations on a audio interface would be nice to hear too.. ANY help would be great! Thanks! EDIT: was just told the jack is a combo line in/headphone jack..is this true?