Once I put the wall circuit computer and monitor and the amp on the UPS too the noise went away. This creates a ground loop and results in the high freq. My midi ports were also powered by the UPS. I had the problem initially on this box because my computer which powered the box was connected directly to the wall circuit while my audio was going through an amp w hich was powered by a UPS. The real issue with the mbox is a ground loop issue. If you ground the audio circuit you will decrease your audio performance. There is a reason why audio circuits are isolated from ground - it improves the signal to noise ratio. I saw a video on UTube advocating soldering a ground wire to the circuit board.
for hooking up your favorite studio monitors, of course, and the Mbox 2 Pro even.
#DIGIDESIGN MBOX 2 PRO AS STAND ALONE DRIVER#
If you have Pro Tools LE 6.4, 6.7, or 6.9 software installed, you should use the ASIO driver that can be installed as an option during Pro Tools LE installation. The Digidesign Mbox 2 Pro offers the highest channel count of any Mbox.
#DIGIDESIGN MBOX 2 PRO AS STAND ALONE MAC#
It comes out the audio out ports and is a definite no-no on your audio tracks. The Mbox 2 Pro CoreAudio Driver can be in- stalled as a standalone driver on Mac systems that do not have Pro Tools software installed. The Digidesign ASIO Driver 6.1.1 can also be used as a stand-alone driver (without any Pro Tools software installed), with the above Digidesign hardware. There is an issue I have seen a lot on the internet which I also discovered - a high frequency noise when the box is activated. This is a great way to get into Pro Tools without spending a lot of $$. Digidesign (continued) Bruno/Reso, 411 DAE, 39798, 400, 409 D-Fi.
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