First off, I love the sound, and the changes to the soundstage. Highs are more clearly defined, which is where I heard most of the improvement, but midrange is a bit clearer too. Massive improvement on my PC, with the USB sounding just as good as the optical. Also a huge improvement playing my Airport Express through Airplay on my receiver. I assume that it handles the jitter better than the built in DAC in my Denon unit. Other inputs (Blu-Ray player or my my Oppo transport) don't sound different. I am sorry I do not have an original Modi or the Modi...