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My MBox or MBox2 is making a high-pitched “whining” noise when it’s plugged into my computer. What can I do?

This 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

If you are on a G5 and the above recommendations don’t help, you can install the Apple Developer Tool called CHUD which helps remove noise cause by the processor to be eliminated.

More information on installing CHUD: http://www.digidesign.com/index.cfm?navid=54&langid=1&itemid=20534

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