I just got an iPod Touch, and I registered it on my main PC, but my iTunes music is on my Macbook, so I plugged it in my Macbook, dragged my music folder to the iPod section in iTunes, let it all sync over, it recognizes the music, and I went to play the music on the iPod, but I couldn't hear any audio.. I then tried going on Youtube and playing a video, and it played the audio, so.

Any ideas?