Eagle13

I'm using the DoP setting in Output Encoding under Output Format and DSD over PCM on Bitstreaming options. DoP is simply a way to get DSD to work over PCM frames (it can be a limitation in the ASIO driver, as I understand it). DoP open Standard | DSD-Guide.com I found it had no impact whatsoever on SQ.

My pleasure, Pete. I'm using the UD-501 solely as a headphone rig. I tested it with my Hi-Fi on DSD only for a bit as a point of comparison to my SACDs. I can certainly imagine that the upsampling may color the sound with such revealing speakers as yours. IMHO, the filter and upsampling options are part what makes this DAC so good.

I purchased the TEAC UD-501 recently based on favorable reviews on this site and others on the internet and am very, very, pleased. I wanted a headphone rig for my PC to replace a Cambridge Audio DM+, which I've been very happy with, but I now have a fair amount of DSD files and wanted something that would handle native DSD (I have a dedicated 2-channel rig for playing SACDs and DSD files in the living room, but often listen to music on my PC, and felt that converting my DSD to PCM was not cutting it anymore). The TEAC UD-501 is a wonderful sounding DAC that IMO, competes with DACs twice its price. It's PCM performance with upsampling ON and the Slow Filter engaged has a neutral to warm vinyl-like quality; and it's DSD performance is fantastic - it sounds comparable to several dedicated SACD decks I've owned and heard. I've been using JRiver MC for years and upgraded to v19 a few days ago and was pleasantly surprised that it now will output natively in DSD: NEW: Real-time DSD output I've spent a few hours this weekend "A/B'ing" between DSD "upsampling" and native PCM. Having JRiver MC 19 output everything to DSD really is the way to go with this DAC! PRaT and resolution have been fantastic on good old PCM (both Redbook and Hi-Res). This DAC is simply marvelous on DSD. Caveat Emptor: Real-time DSD output requires a fairly powerful CPU! And, as always, YMMV!