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bobflood

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  1. The Holo Spring 2 DAC and May DAC are pretty close to that ideal. The Dennefrips are also on that list. Disclosure, I own and love a Holo Spring 2 KTE. I like your project idea, good luck!
  2. Hi Chris, Just saw this. Here is my take in no particular order of importance: 1. Limiting choice means having a unique product. 2. Limiting choice preserves the "House Sound" (every high-end manufacturer has one and jealously guards it) which is what brings and keeps many buyers. 3. Limiting choice means easier support. 4.Limiting choice preserves the high profit section of a modern high-end DAC which is the computational section. Most of the mega dollar units you review are really mostly custom built computers with proprietary software connected to an output stage. The money is not in the output stage. 5. Limiting choice reduces the fear that some some users will totally mess it up and will then blame the manufacturer for the poor sound profile. 6. Limiting choice reduces operational complexity as in "is the internal filter on or off and how can I tell and why should I care". All of this reminds me of the old saying "generals are always fighting the last war".
  3. bobflood

    HQ Player

    Wow, that is an accomplishment! I look forward to the write up in a few weeks. Thanks and have a safe and happy 4th weekend and a relaxing week off. Truly, take the week off. You deserve it!
  4. bobflood

    HQ Player

    Thanks Chris, The filters that will probably push it harder are the sinc M and closed form M type filters. I can only get those to run on my machine in PCM but I don't have a GPU. I need a passively cooled setup as my machine also serves as my office desktop and it is to close to the main music system in the living room.
  5. bobflood

    HQ Player

    Hi Chris, Try testing DSD ASDM7EC 256 against DSD ASDM7 512 &1024. It would be interesting to see what effect the higher rates have vs the EC modulation both using ASDM7. I am curious to see if you can even get to DSD ASDM7 1024 and have it remain stable without liquid cooling of the CPU. Also, try testing various filters (straight and 2s) at progressively higher DSD rates with and without the GPU to see which filters truly need the GPU. My guess is that at DSD ASDM7EC 256 you will need the GPU for most filters. Have fun.
  6. bobflood

    HQ Player

    Sorry to hear that. I guess the problems I read about were people with ST i9 machines.It was back when the ST i9 was introduced. I don't remember the specific model being mentioned back then. Here is another possible solution. Keep the ST i5 and run Roon only on that and put HQP on another separate machine and just have Roon send to that machine. I will say that getting Roon and HQP to run happily on one machine is not always easy or stable. I have both running on a i5 8400/ASUS Z370I machine and I have have managed to get them to run together but it did take a bunch of experimenting with the BIOS and Win 10 settings. I now can do DSD 256 EC as long as I stay with 2s filters. If I were to start over now I would not try to get them to run together on one machine. I would buy an ST i5 for Roon and get a dedicated headless HQP machine for the up-sampling. To make it fool proof, I would just run one of Jussi's HQP OS images and be done with it. With Windows or Apple for that matter there are just too many extraneous things going on that you just can't control for it to ever be really stable. With Windows it is phoning home more than ET and much of it is beyond our control. Anyhow, sorry I gave you a wrong turn but you do have options.
  7. I think you will be happy with ST i9. The only other choice is a DIY project like the one Chris is coming out with for this purpose (CAPS 20). If you are up for that you may want to wait and see what it entails. I have Roon and HQP together on a two year old specially built for me Win 10 machine. That is another possibility but it does require some fiddling around with BIOS and Win 10 to get it stable. Have fun.
  8. David, Any chance that you could add this: https://www.discogs.com/Larry-Carlton-Sapphire-Blue/release/709212 You have most of his other stuff but this is missing. Thanks, Bob
  9. Post this on the Roon support forum as well. The support guys there may have seen this before. I have seen issues with Qobuz 24/192 playback there from time to time.
  10. bobflood

    HQ Player

    You are welcome. I remembered seeing posts from others a while back having the same problem with the ST i5 but have not seen that issue recently. I thought Andrew had solved that problem. I am sure he can fix it for you.
  11. Hire one of those Marines you sewed up a while back and put a pic of him holding some bad ass gun as your default picture.
  12. bobflood

    HQ Player

    Jussi has said here before in response to this question that the modulators do not work on multiple cores. They do not work in a distributed architecture. He has given the technical reasons before so search the thread for them. Each channel requires one core so two cores for stereo are needed. The higher the desired output rate the higher the required clock. Using EC modulators DSD 256 requires about a 4 Ghz sustained clock on those two cores. The filters on the other hand can be distributed to multiple cores. That is why offloading to a GPU works so well for the filters. GPUs are all about a distributed computing architecture. If there is not going to be a GPU (cost, noise, heat) then the best chip is one that can turbo two cores to just over 4 Ghz and keep them there and that has multiple remaining cores left for the distribution of the filters and the OS processes and maybe a concurrent program like Roon. Such chips are few and far between and are not cheap. There is an entire thread about the best chip for HQP and DSD. The current King of the Hill is the i9-9900KS. This chip is over $500 and is difficult to cool especially using passive and even air cooling. Under heavy load it creates a lot of heat. So a more modest chip and a capable GPU may be the way to go. Jussi may have more to add but what I offer here is a summary of many prior answers to this question.
  13. bobflood

    HQ Player

    Not with that particular switch but I did have a similar problem with a 10G port on a switch so I changed over to a 1G port on the same switch and no problems anymore.
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