I think I know what you are talking about. The Gungnir A2, despite it's less even more finicky tonal balance (using HD650 right now for the proper synergy) is actually the same way! I think it's a fluidity thing that only multibit DACs (and vinyl or tape) exhibit. Sigma-delta stuff imparts a temporal grain or choppiness to the presentation which never quite seems whole. Now this isn't the same thing as instrument separation of being able to hear the processing differences in track overlays, which the Gungnir A2 is bit better. Another possibility is the difference in microdynamic rendering. Modius lacks volume granularity, a choppiness in the amplitude domain, and the ability to make fast changes in volume. Both the temporal and volume choppiness contribute to this sense of the picture being a collage of items cut and pasted on canvas instead of a real painting on the canvas. However, Modius is actually not bad, quite good, though on an overall basis compared to other DACs. It's comfortably in the mid-end, handily equal to anything we may find in the Crutchfield or Audio Advisor catalogs.