So, Dan, I've stated before that I no longer enjoy up-sampling DACS (over-sampling being okay, as well as NOS) because I've identified the digital fatigue I used to experience as coming from their treble quality. A kind of "out of phaseness" with the other frequencies.
I recently had the chance (thanks to Levi here on AC) to spend a few hours with the new up-sampling Eastern Electric tube DAC based on the 32 bit Sabre chip in my system. It was impressive overall for the price and very impressive at any price in its presentation of high frequencies. Although I'd want to listen longer to be sure, I didn't hear any of the problems I've heard with all other up-sampling gear. The highs seemed very coherent with the other frequencies and were definitely very extended, sweet and resolving.
Have you heard any implementations of this chip, and, if so, what were your impressions?
Thanks,
Rob