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SwissBear

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About SwissBear

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  1. SwissBear

    HQ Player

    Hi Jussi, I notice that it is not easy to communicate in an efficient way on this subject of high precision clocks. On the "objective" side, you have your knowledge and I have mine. You are referring to the J-test, which is the standard in the industry, whereas I have strong doubts that the distribution of the said J-test, which is "centered" at 12 kHz, could in any way render the difference of performance of clocks, which performance are quite even at this frequency. The improvements of high precision clocks are to be found in the low range of the audible spectrum, and
  2. SwissBear

    HQ Player

    What kind of equipment would I need to make such measurements ? APx555B at 30'000+ US or is there a cheaper strategy to make such measurements ?
  3. SwissBear

    HQ Player

    Thank you for your explanations. It is the interface which does the translation of the 10 MHz clock signal and the clock signal to be used by the DAC. Singxer has a good expertise in this field. The x-Sabre has a mode, called synchronous, which can be selected through the interface, where the DAC would follow the clock signal received together with the music flow; the PLL can be disconnected as well. In the case of the D90, the technical support of Topping mentioned that the DAC would have the same behaviour if fed through the i2s interface. My unders
  4. Hi, I have not listened to it yet. I currently have a Singxer SU-2, with a Mutec REF10 as a master clock, connected to either a Matrix Audio x-Sabre or a Topping D90. What I really appreciate with the SU-2 is the very good galvanic isolation of the USB input, and the capability of the product to apply a high precision clock signal to the i2s flow it is creating. Clocking/Reclocking is a skill of their engineering team and they know how to do it for sure. I am very interested in this new DAC from Singxer. It has very good measurements: https://translate.google.com
  5. SwissBear

    HQ Player

    Hi Jussi, Yes I tried through the USB interface of the DAC, it works flawlessly with DSD512. Having read you extensively on this subject, I appreciate that you do not have a lot of consideration for those interfaces 😉. Having said that, I have to acknowledge that I am very sensitive to the presentation of music which is achieved with high precision clocks (Mutec REF10 in this case). And those I2S interfaces are the only way I found to feed the DAC with a higher precision clock than their own, when they are not equipped with a master clock input. And tho
  6. SwissBear

    HQ Player

    Thanks Ted, Not sure what you mean by ALSA Driver as HQPlayer is running on a Mac which has no such drivers. I am selecting the SU-2 as a device visible from the NAA though. I tried to send some files directly from HQPlayer without Roon and the results are the same: with DSD512, I have the music, attenuated, with noise. This is random though ; I could also have just white noise...
  7. SwissBear

    HQ Player

    Hi Jussi, I have a difficulty with a new configuration (interface + DAC), where I am not able to play DSD512 with HQP. Config is: Mac Mini M1 -> NAA ->(usb)-> Singxer SU-2 ->(i2s)-> Topping D90 When using Roon only and replacing NAA with Roon endpoint, I am able to play DSD512 When using Roon+HQP, and using NAA, I am able to play DSD256. When switching to DSD512 (obviously non EC modulators), I either ear white noise, or music with interference In the same situation, with a different DAC (x-Sabre), I have no problem playing DSD512
  8. SwissBear

    HQ Player

    Hi Jussi, I would simply like to share that I am delighted with the Up Gateway you have recommended as NAA. I received it the other day, copied your NAA image onto a thumb drive, plugged it and everything went absolutely smoothly. The sound produced is perfect. I could even use a rail which was made available on my LPSU to power it. So I am more than happy and grateful for the support you are providing us through this forum.
  9. Hi @Confused, How have you been doing. It's been a while since we last touched base. I have not really compared Singxer SU-2 with Mutec MC-3+ USB a/b. I have acquired a very modest DAC, a Matrix Audio x-Sabre Pro MQA. This DAC has one functionality which is outstanding for me: its clock can be configured to follow the clock included in the I2S (or SPDIF) music flow. It's called Sync mode in the user manual. In this mode, the clock of the DAC is therefore given by the clock of the SU-2, which is in fact synchronised with my Ref-10 (SE-120 as I upgraded this one).
  10. I have two REF-10, one on each of my systems. I recently moved one system to a DAC which can be fed via I2S. I tried to find a way to use this input to provide a clean clock signal to my DAC. I first asked Mutec for a solution, but they could not offer anything apart from the MC-3+ USB, which is limited to PCM 24/192. I tested the Audio GD DI20-HE interface and was not satisfied. On the machine I tested, I found too many distorsions to feel happy and returned it. I just received a Singxer SU-2 and connected it to the REF-10 (SE120). And this was an "whaoo mo
  11. SwissBear

    HQ Player

    Hi Jussi, I have read earlier that you declined to make recommendations as far as PSU are concerned. Can you please share with us how you are powering your UP Gateway as 5V/4A does not seem easy to power with clean PSUs. Thanks. Pierre
  12. SwissBear

    HQ Player

    Hi Jussi, I have made extensive listening with the new software and 2 DACs I have: one x-Sabre Pro and one darTZeel LHC-208. On both installations I noticed the quality of the experience I had with the ASDM7EC modulator in DSD 256, but I also noticed that I had a preference when I used a mode to input my DAC in PCM 20/196, which allowed me to go through a Mutec MC-3+USB to transform the USB flow into an SPDIF flow clocked with a Mutec REF-10. This is just a personal preference and absolutely not a judgement of the quality of the DSD flow produced by your code which is awesome.
  13. SwissBear

    HQ Player

    Hi Andreas, I notice that I did not reply to your question. I also notice that Jussi has covered most of your concerns. I would just like to underline the fact that my Mac Mini M1 has a PSU which is quite noisy electromagnetically in the sense that it is polluting some of the other equipments I have powered on the same rack. So I decided to put it in a place in my house where this is not a concern. But the performance of the machine, and the code produced by Jussi to make the best use of it are awesome :-) Hope this helps.
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