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About romaz

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  1. PGGB was not initially intended as a commercial venture but rather a passionate pursuit among 4 like-minded audiophiles. @Zaphod Beeblebrox, @austinpop, and @ray-dude are electrical engineers. I am the odd man out but as a physician-scientist, I have strong technical leanings and so you can imagine the endless "nerdy" conversations. One thing we each had in common was our admiration for the Chord DAVE and for Rob Watts' philosophies on PCM upsampling. This is not to say that the approach of others is less valid but for our group, this is what galvanized us. We looked at all the thin
  2. Yes, I agree with @ray-dude, my Extreme is currently in a state of "perfection" where I am just loving what I'm getting. Periodically, I will step back to Roon so that I can explore Qobuz or Tidal and when I find something really good, basically, I buy it and store it locally onto my Extreme and play it back via HQP. I have had the opportunity to test one particular feature that will be part of TAS and while I don't have the authority to really speak about it, it is enough to know that TAS + HQP should sound better than HQP by itself.
  3. This is true and is the advantage of pairing a Chord DAC with Chord's M-Scaler as it offloads upsampling to a separate device. If a Chord DAC is relieved of it's upsampling duties, the DAC's FPGA essentially runs idle and even Rob Watts himself has suggested this is one reason why M-Scaler improves SQ.
  4. I, too, was frustrated by the limitations of the unregistered version of HQP and 1 minute of listening time is indeed very short and so what did I do? I bought HQP Pro and I am both pleased but also have regrets. I am pleased because it did everything it claims to do but I have regrets because somehow, I can't get it to run on my Extreme and so as of now, I am forced to run it on a server that is far inferior to the Extreme. The process has been educational and what I am finding is that the quality of the files that you generate with HQP Pro is very much dependent on the quality of the serv
  5. There is definitely a case for NOS and sometimes this comes down to personal preference but also, there are some DACs that just sound better when fed a bit-perfect signal.
  6. I am finding HQPDcontrol on a tablet to be my preferred way of interfacing with HQP but I agree, this is where Roon really shines. Yes, these are some of the downsides of HQP standalone which is why I'm eagerly awaiting Emile's new software player, TAS which will allow both Qobuz and Tidal playback and will have an HQP interface. Yes, agreed. Optane versus SSD is well discussed on this thread already and as @lmitche explained to me some time ago, Optane drives are based on memristor storage which means they need no refresh activity to hold data. S
  7. Good points, Ted. According to Emile, the older HQP v3.x can see both of the Extreme's CPUs. Somehow, v4.x cannot and so something has changed and neither Jussi nor Emile have been able to rectify this. Yes, this is the point of my post. The Extreme is not the ideal platform for DSD upsampling. As @ray-dude said, there are those of us who use it specifically for PCM upsampling which runs splendidly on the Extreme. Yes, I would love to rectify this and hopefully, one day, I can get some version of HQP with the sinc-M function to see both CPUs be
  8. In my opinion, Chord DACs are not the best DACs if you love DSD.
  9. Thanks for explaining. If you are going to compare an HQP setup (intended for DSD upsampling) versus a machine like the Extreme that is not set up at all for HQP upsampling, then the results with be expectedly different. If you really like the sound of DSD 256 ASDM7EC, then I would expect that your server that gives you this is going to sound better than a server that doesn't. Your post really isn't about the Extreme versus your DIY build but rather your preference for DSD upsampling versus NOS.
  10. Yes, agreed. As I stated in my post, these GPUs are power hungry and noisy devices and so their pros have to be outweighed against their cons. If your CPU doesn't have enough horsepower, offloading to a GPU can get the job done. As for my statement that "Nvidia Pascal GPU as a minimum and the Volta/Turing GPUs being better still," I should have given credit where it's due as this comes from Jussi. While I experimented with GPU offloading briefly, ultimately, it's not something I'm that interested in since I have no interest in DSD upsampling. Yes, agreed once again.
  11. Having now owned my Extreme for nearly 9 months, I'll add my own experience with the Extreme to what @hols has shared as further "food for thought." Back when I was using Euphony/Stylus with my own DIY servers, I thought I had said goodbye to Roon for good. Yes, I missed the overall Roon user experience as I felt it was unmatched but I eventually got over it because Stylus just sounded so much better. What was so special about Stylus was that Željko Vranić, Stylus' primary programmer, carefully vetted all updates to make sure that SQ was not somehow negatively impacted and it was amazing ju
  12. Maybe not the best place for this post but I will try and respond to your questions and comments since Matt brought me into it. The Extreme, from inception, was a "cost no object" product and represents Emile's best effort based on available technology. At one time, Emile used to make his own OCXOs and used to provide OCXO boards for other music server manufacturers and so the fact that he has left out high-level clocking in the Extreme has nothing to do with cost. To provide some background on Emile's approach, first and foremost, he listens and his ability to hear is exceptiona
  13. Unfortunately, this has not yet happened for a couple of reasons. First, when I tried to load Euphony from a USB stick shortly after I received my Extreme, it would not load and so I knew I would have to take my Extreme down from my rack, connect it to a monitor and keyboard, and look at the BIOS to make the necessary adjustments for it to boot. This has not been convenient to do as the Extreme is so heavy (nearly 100 lbs). Second, my motivation to do it is now less because I am reliant on a certain piece of software for SQ that runs only on Windows and so I know in my situation, Euphony wo
  14. I have no experience with Sean's latest DC4 but have known of it for some time. As an owner of one of Sean's custom builds, I have only good things to say about his work.
  15. If you don't power the Monoprice with an LPS-1.2 or a battery, you won't get the full benefit of optical isolation since the receiver unit doesn't just provide 5V VBUS to the DAC but also requires this 5V that it receives from the transmitter to perform D-to-D conversion (optical back to copper). In effect, the receiver functions like an FMC except with a USB signal rather than a network signal. Just like an FMC, the quality of the power supply matters but furthermore, if you've decided to move your server to another part of your house and you've plugged the server into a different AC circui
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