I have our iMac media computer connected to the soundboard. It's so easy just to make a playlist and play music directly from iTunes. You can do that with a PC also. Songs in iTunes are not necessarily imcompatible with other media players. Most of my libraries both at home and at church were ripped into iTunes from CDs, flashdrives, etc.Whenever I need songs that I downloaded from iTunes for videos, slideshows, etc. I just use my PC and open them in Sony Soundforge. I then convert them to MP3 files that are compatible with just about any player or editing software. It's very simple to do. I believe you can do this in Garageband also but I am so NOT familiar with Garageband.