Quote James Perrett:
Martin - if the AE22's have balanced inputs then you need to make up some phono to XLR (or jack) pseudo balanced cables. Connect the tip of the phono plug to pin 2 on the XLR and the outer of the phono plug to pin 3 of the XLR using the 2 cores of a 2 core + screen cable. Connect the screen of the cable to pin 1 of the XLR but leave it disconnected at the phono end.
Thanks for getting back with this suggestion. Is this a shielding remedy? Just for the record, I put together a ground loop box per kind instructions from ef37a (Dave) without any success. In fact the buzz was worse. I am just not sure this is a groundloop problem. The buzzing seems to be more digital than ground loop hum. Also, the noise is worse when I am in the DAW. The larger the template, the louder the noise. Click on W7 desktop and there is very little noise. If I click on the menus in Reaper, again, the noise diminishes. It does seem to be video related. Reducing the buffer on my 2496 reduces the noise but it is still bad. The monitors also appear to pick up signals when the mouse is moved. I will give this a try though.
The only successful cure to the buzz is when I use a Skytronic isolator. Trouble is, it also appears to filter the performance of the monitors. They sound enclosed and lose their dynamics.