Hello i have a 13inch Mack Book 2.16 and 2 GB of Ram. I use this computer alot when i DJ and i use it in big Theaters when i am running shows. I bought a new monitor and an adapter to go from the DVI ( i believe thats what it is) to VGA. When i was at the Theater last night i connected my computer and the second i plugged in the monitor i started to get line noise(or Buzzing). I took the connection out of my built in Line out (or head phone jack on computer) and i have a USB to 3.5m ( gives better sound quality plus i use it when im Djing. and the Noise still comes through. I also took it home and tried it on my sound system and it still comes through. Any one have suggestions. Note- This is not happen when i use regular headphones but i think this is because they are not really amplified alot.

Thanks
Tim