30-May-2015, 16:56
An update. I had been running AIR 2.1.4 beta4 for a few weeks. It was becoming more and more apparent that this version was rather prone to jitter, stuttering and other annoying artefacts. As a positive, no white noise at all. I have now returned back to AIR 2.1.4 beta1, this is also white noise free if I am careful with PC settings etc, and far less prone to jitter etc.