It is the quality of the 'card' as *well* as the PSU. The 'sound card'
should smooth its input power if the circuits inside would otherwise pick
fluctuations up. If it was made to draw power from USB the designers should
not be so clueless as to assume the power will be absolutely clean. But of
course, if you bought a cheap-as-chips one, they won't have had any
incientive to do much about it.

You don't say *which* "Behringer" device you're using. The cheap ones I
tested certainly needed a decent PSU to work OK. I tended to use an
externally powered hub bought from CPC. But in practice if you want to
avoid such problems you probably need a device with its own dedicated PSU.

Jim


In article , Brian Gaff
wrote:
I don't think its the quality of the card or whatever, its getting in on
the supply I think. The internal card is quite good but its ruined by
being so near all the nasty noise generating components. At least this
device is made by a good well known company and is remote but does use
the 5v on the usb for its power. Brian

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