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manisandher

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About manisandher

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  1. manisandher

    HQP

    Hi Shreekant, I placed a post on the Phasure forum a while ago and suggest you look through that as a first step: http://www.phasure.com/index.php?PHPSESSID=9ikkvso6qef76np3q2423s35u5&topic=3814.msg41580#msg41580 It's well worth the effort getting HQPlayer working with the NOS1 DAC. In my case, it allows me to use Roon, which I really like using in my office system as I'm working. Let me know if you have any further questions. (I'm travelling for work quite a bit nowadays, so it may be a short while before I can get back to you.) Mani.
  2. $129? My personal brand is worth at least double that.
  3. Sure. It seems to me that it's the most likely mechanism responsible for audible differences at the point of D-to-A conversion too. But yes, not the topic of this thread. Mani.
  4. Right. So why is it so difficult for some people here to accept that such D/A inaccuracies are audible? Without such an acceptance, we'll never get to the point where audible D/A inaccuracies can be understood and overcome. Mani.
  5. WTF? Do people like this really exist? Unfortunately, it seems so...
  6. Yep, I see what you mean. Still, it seems strange that the intermodulation distortion in the analogue circuitry sits exactly at 56 kHz, 66 kHz and 76 kHz.
  7. It looks obvious to me that the spikes at 56 kHz, 66 kHz and 76 kHz are images of the harmonics at 40 kHz, 30 kHz and 20 kHz, respectively. (Much easier to see on @vortecjr's plot.)
  8. Surely the spikes at 66 kHz and 76kHz are simply the images of the 30 kHz and 20 kHz harmonics, respectively? Nothing of interest, as far as I can see. Did you mean ~70 kHz and ~90 kHz? Edit: I was looking at @vortecjr's FFT.
  9. I know @mansr has already pointed this out, but you really should refer to this as 'imaging' and not 'aliasing'.
  10. The 86kHz 'noise' is just the imaging (48+38 kHz) due to the 'leaky' MQA filter. I'm sure MQA would argue that no regular music content would have any signal lying at -10dB at 10kHz. I'm sure something like the 'polynomial' filters in HQPlayer would produce a similar result with a -10dB 10kHz signal. Probably why @Miska recommends against using them. Mani.
  11. No, the renderer seems to be adding the 80kHz content.
  12. You can fool the MQA renderer into thinking that this is an MQA-encoded signal that has been decoded?
  13. A review... for fun? Sacrilegious. But sure. The guy who put the amps together for me made them. I just gave him the specs - a pair of linear 24V/5A PSUs. Mani.
  14. Why not just answer his question, and then perhaps outline how the answer could have been arrived at from the scope shot itself?
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