Unfortunately, even after downloading drivers manually and fudging parameters ad infinitum, I was never able to get my system to work with the Walnut x.3 free of the odd 'pop' here and there. Despite that I really enjoyed the DAC -- it's a pretty much impeccably balanced listen all around. When I first got into the hobby and heard the phrase 'audibly transparent' thrown around, usually in relation to Topping DACs (bllllurg), this is pretty much what I had hoped for/expected. Nothing feels overly accentuated or embellished at the expense of other areas of the soundscape -- it's all there, rich yet not overindulgent, incisive yet not bright or clinical. If I had to really dive deep for personality descriptors, I'd say that there's a slight etchiness to the upper mids, but not in an unpleasant way at all -- but certain transients (grit in male voices, and acoustic guitar in particular) have an extra visceral presence that is a little more prominent than most other DACs I've heard. To my ear this robbed it of the 'airiness' of Gungnir or Yggdrasil, but lends it great authority as well. I also enjoyed how it handles bass, there's some really nice composition to the sub-to-mid-bass range that lends those frequencies a deep-reaching throatiness while also lending plenty of texture and heft. At the risk of slightly contradicting myself this actually might be something it does better than other DACs in general -- one of my favorite go-to demo tracks is Steely Dan's 'Home At Last' which opens with a salvo of piano notes interladen with bursts of drums and bass guitar -- in those quiet moments of piano I noticed an odd sound -- and realized it was the mallets moving inside of the piano. I'd never noticed that before, as it's enmeshed pretty down low in the frequency range; I'd missed it even with the Iggy LIM, yet I heard it here fairly clearly. It's also a beautiful little DAC -- I love the small footprint, as well as the wood and pretty colored lighting For anyone keeping track I had quite the recent spate of DAC trials (BF2, Gungnir, 2541, Yggdrasil LIM) trying to find an upgrade to my Bifrost, and sound-wise this was my favorite of the lot, value-wise as well. My issues with the USB input would be my only hesitation in pulling the trigger on one were they to become available again. Thank you again @Erroneous for the loaner tour!