I don't know a whole lot when it comes to sound, so I appeal to you for advice. I connected my MBP to my stereo receiver using a mini stereo to RCA cable (from Monster), and I have two issues. First a really annoying buzzing sound can be heard through the receiver speakers only when I connect my MBP. The wifes MB and my iPod do not produce any buzz when using the same cable connection. Edit: Also worth mentioning, no buzz can be heard if I connect headphones, its only this AV receiver connection. Any thoughts? Second, the levels are really weak with ALL of my devices such that I really have to jack the volume on my receiver just to hear anything. For example, when I watch a DVD or Cable TV (both digitally connected) I usually set the volume level to around 13 on my receiver, with my laptops/iPods I have to set the volume to around 35. Do I really need to preamp the signal with some device or is there a preference/application that will do this from the MBP? I have not tried another cable and don't have an available optical connection to use digital. Thanks in advance.