High pitch noise coming from passenger side

NRGSwing

It's not the fuel pump, I think you can hear the fuel pump pressurize whe you first switch to "ON". This is higher pitched. I noticed it when I was burning a disc to the music box. Car "ON", in gear, but not running. Hadn't noticed anything about shifting to neutral, but I think this isn't related to OP issue as I don't hear it when driving.

Edit:
Ok, just went to the garage, it does go off in neutral. Seems to be coming from right under the engine cover near the firewall, almost dead center. With a closer listen, it almost sounds like you can hear something like a disk drive spinning as well so maybe it's associated with the Music Box although it wouldn't make any sense for it to be connected to being in gear.