I've recently become a founding member of a group partly formed by Mike Oldfield's own brother, Terry Oldfield. The owner of the group (maybe Mike himself, for all I know) gave me some criticism of my cover of Mike Oldfield's song 'Sentinel' from the Tubular Bells II album. I was told that this recording has virtually no dynamic range. It is quite possible that I've run it through too much compression, and in all honesty I don't really know what I'm doing with a lot of audio tools. I use them, but for the most part I turn knobs and change variables until it sounds good to me. And over time I lose objectivity, and wind up having to take a break for a day or two, and come back with fresh ears. This cover has always sounded ok to me. I would like to get some useful criticism and maybe some tips on how to improve this mix.