On 2016-04-10 08:43:14 +0000, Brian Gaff said:

I have been trying to make my new computer integrate with my stereo
system. However even using a Behringer usb sound interface still
produces a whine and general hash low level to playback signals,
though not noticed on the recording if its transferred to cd and played
normally. The question is that as things are plugged into the usb the
tone and loudness varies, so I suspect its either the power supply or
something inside the computer putting out this noise. If I got a hub
with a psu so that the sound unit could be powered by that, do you
think it would be better.
It is low level but you know how it is, once you heard it, you always hear it.
Brian

Perhaps an earth loop problem. I was able to remove a continuous
background whine from an M-Audio USB DAC by using transformers on the
output to break the earth link between the computer and amp. I believe
that there are also USB isolators to do the same on the digital side,
which would be better.

Arthur

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real email arthur at bellacat dot com