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[John Bordon]

I have a mbox /Mac Laptop/Motif keyboard all hooked up together.
when the Motif USB Line is hooked into the system I am getting a "Wining" noise over the Motif audio outputs and headphone outs. I Tryed different cords, with/without dc power wall wart to mac.

PS This isn't a 60HZ hum..  It sounds a little like having a radio on when you crank on a vacuum. RF without motor pitching up and down

Anyone cured this yet?
JPB

[how_gauche]

I had the same problem with my mbox. The problem is that your usb line is not getting enough power to the mbox, which needs, I believe, >500 mA at +5VDC. In fact, in my system the mbox drew so much power that it fried a power supply (the plastic on the +5VDC rails on the power connector that goes from the supply to the motherboard actually MELTED).

Some people have reported that going to a powered USB hub solved their problem, and it did solve my problem with noise, however going through the hub made the mbox drop samples even at a buffer size of 1024. I eventually got fed up and ditched the stupid mbox in favour of an Edirol FA-101, and I'm pleased as punch --- even when the mbox was working properly I always felt like I was fighting the equipment, the firewire box just WORKS.

[John Bordon]

thanks Guache.
what your diagnosis says is........ there is a "USB Phantom" conflict that I have to deal with....... Anyone else have a input?

JPB