Hi, I am new to Macbook. I used to have a sound card for my old windows laptop. Now, I just have a MacBook and a Grado SR 125 Headphone, I am wondering how can I make a better quality of Music(which all my music formart are either ape or flac). I hear there is a sort of optical staff come with macbook, however, I am still confused about all the info I read on internet. so you guys have any suggestions for me, really appriciated.