Sound so far is crisp and clear. Seems less processed in a quick comparison to some of the same material in the four cd set released in Europe within the last few years, "The Best of Duke Ellington." (The material in that four cd set sounds very good, a bit warmer than on the Mosaic, but I have the sense that there's been more EQ applied; the mastering credits are significantly different.)
This is great music that it's such a gas to visit and revisit! Today I feel so dicty!