Intel i7-3770K CPU + nVidia GTX 1080 GPU Windows 10 computer -> 16' generic USB -> Oppo UDP-205 as DAC -> generic 6' XLR -> RME ADI-2 Pro FS ADC -> generic USB -> Win 10 i5 measurement laptop For the tests today here is the general hardware set-up: The demo will run for 30 days, but 30 minutes at a time - enough time to try out, listen and run samples through the audio analyzer to get an idea of what it's doing. The tests today are done with a recent version of HQPlayer - 3.25.2 available as a demo (I see that there is now a 3.25.3 build available at the time of publication). Well, after all these years, and now with the requisite pieces of hardware at my disposal for a more thorough evaluation (reasonably fast CPU/GPU system, ADC capable of >192kHz, DAC capable of DSD512), it's time to have a peek "under the hood" at what it does. In fact, back in early 2017 when I wrote about Roon 1.2, I mentioned installing HQPlayer but never got around to actually writing about it. It has certainly been on my list of items to look into. In this way, HQPlayer has been a bit of a mystery and I know some folks have had difficulty getting it running over the years. While admittedly I don't follow HQPlayer chatter closely, I don't recall reading about specific settings and what they do other than opinions about the sound quality. There has been a good amount of talk about the sound quality of the upsampling algorithms and some swear by the sonic differences the program makes. While there is a GUI for playback as well as a sophisticated network transport architecture, it's the upsampling and PCM-to-DSD features that are the program's claim to fame.
Over the years, no doubt many computer audio users have heard or perhaps tried using HQPlayer Desktop from Signalyst for music playback.
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