High Whine on Playback

[jikaru]

Hello all,

I'm getting a high whine when I playback my Pro Tools tracks. It's less when I turn off Phantom Power but it's still there.

Any suggestions?

Jim

Computer model and processor speed - I have an iMac with 2.16 Dual Core Intel Processor
OS version - I have Tiger 10.4
Pro Tools version - 7.4
Amount of RAM installed - 3 Gigs
Number and type (firewire, SATA, SCSI, etc) of drives installed - I have an external Lacie firewire hard drive
mbox interface

[Phil Ogden]

Mbox or Mbox 2 experiences whine or high pitched noise while in use
The problem is related to either the computer itself, or to ground loops induced by plugging gear into multiple outlets or just plain bad grounding. The Mbox is generally not the culprit.

The following steps can help resolve the issue:

1) Plug all gear into the same outlet and/or make sure your outlets have a good ground.
2) Use TRS (balanced) cables from the outputs of the Mbox.
3) Get a Monster 'Ultimate Performance' USB Cable

[15yearsonptools]

I had a similar problem coming from Amp Farm the other day. Almost like a tone generator at 15k. It went away when I reset the plug. Phil is probably right about the ground thing

[jikaru]

Thanks, Guys! I'll try your suggestions!