Thanks for reviewing this LP. I am a Clevelander and while I was not at the recording, I have seen Ensemble HD at the Happy Dog a few times. It's great that they are getting younger people interested in classical music.
More deatils on the recording are on their bandcamp page: http://ensemblehd.bandcamp.com/album/ensemble-hd-live-at-the-happy-dog To summarize it was recorded digitally at 96/24 with vintage Schoeps vacuum tube microphones. I do think it sounds great and my copy does not have the non-fill and crackling. I think Gotta Groove is an underrated pressing plant.