Per Alan Parson's Q & A sessions on GS, he was asked about using compressors. He stated he did not use compression on his mixes. So what's up with that? Alan saying that, and my recalling of his Alan Parsons Project albums, it kind of makes sense (to me anyways). Those albums sound heavily produced to my ears, yet still well balanced dynamically. It suggests he uses a whole lot of automation. It would also seem to reflect on his recording and arranging ability, since the way I learned to use compressors was also as a musical time tool, and not just for controlling dynamics.