You can click on my system to see my setup, and even though I use an Airport Express you may be doing yourself a disservice by using one with your DAC. The Altmann has jitter reduction so it shouldn't make any difference, but I would suspect that output from the AE isn't that clean.
I have no trouble with interference and stream it all over the house. Have you tried turning "interference robustness" on and off with the AEs, different multicast rates, different channels, moving the AEs, etc.
Download a freeware program called iStumbler. It displays all networks within range with details on channels used and strengths. Look for other networks on your channel and switch if needed.
I have no trouble with interference and stream it all over the house. Have you tried turning "interference robustness" on and off with the AEs, different multicast rates, different channels, moving the AEs, etc.
Download a freeware program called iStumbler. It displays all networks within range with details on channels used and strengths. Look for other networks on your channel and switch if needed.