I have been tidying my garage - unplugged, labelled and rerouted my 5.1 USB system.
plugged back in - terrible noise again. What's occurring?
The USB to the Soundblaster 5.1 is shared via USB hub.
Last time we added ferrite beads - still there and reducing the mobile phone type interference.
BUT there is a 2nd device on the hub - going to my Zoom R8. And if that isn't powered on at the Zoom you get his awful noise.
You can have Zoom on and yet wall socket off - so thar Zoom is still logically powered off ... that eliminated the noise. or you can also have Zoom on with power.
but don't just plug a Zoom (or any device) to the hub that is off - it seems to cause earth to float?
Негізгі бет More USB audio troubleshooting
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