Ms Kitty, you eventually need to experiment with the Main audio functions of your Mac. Insert a CD, and check-out the control panels. The main thing you will notice online is that most people are using 128-bit files, meaning they are doing Medium resolution imports. Some songs sound much better in 160-bit, or High resolution. This is especially important on symphonic and horns and string sounds. Have fun, and welcome to our (ideally quite helpful) internet community!