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dmance

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About dmance

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    Burlington, Ontario, CANADA

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  1. DAC: Chord TT2 that's been RF isolated using audiowise products. Server: does not matter if it's fully RF isolated from the DAC. But use an optical signal chain.
  2. It's all about RFI/EMI noise affecting the DAC ...more specifically its final D/A conversion from bits to volts that needs to be free of RF noise. Deviations in the DACs output clock and reference voltage will perturb the output waveform. These are caused by even impossibly small levels of RFI/EMI coming from digital devices, switch mode supplies, the AC mains, etc to impinge on the DAC. More RF noise = worse SQ and more fatigue. Our ear/brain only relents and relaxes to digital music when the DAC output is as RF noise free as possible ...well below what we can measure. Otherwise we all 'feel
  3. @Racerxnet Just to frame your consideration of a solution: Please understand that nothing you do to your PC alters the fidelity of the bitstream. Any BIOS changes or other OS settings or hardware tweaks still let the digital audio get to your DAC with 100% bit perfection. If it was not the case you would hear dropouts, pops and clicks. Whenever you hear a change in the sound quality from your DAC by changing your PC is because you alter the RF emissions profile: through the signal cable, through the AC connection and radiated in free air. Your DAC is living in a se
  4. Only possible to stop MHz-GHz is with a RF isolation chamber. And i don't quite understand the mechanism ...but DACs become much more transparent when they measure zero ambient RF noise.
  5. Even the cheapest DAC decodes the bitstream without error. ...just like this CA post is coming from a distant server thru over half a continent of wires and switches. I don't see you touting using special laptops or phones to accurately decode the bits to English. That's stupid, right? I don't want to flog a dead horse but 18 months ago I walked in your shoes and believed the same things. My education came from the frustration of a CD player over spdif sounding much better than the same ripped CD on a laptop thru USB. Same DAC in both cases and its the same case you
  6. For those who believe that cpu/cache/ssd/OS alter the bit perfect nature of usb transmitted audio ...I say: you are deluded, sorry. Don't repeat the faulty "digital is just analog" misunderstanding of what is going on. Bits are bits all the way from the algorithm to the DAC input. Period. For those willing to become enlightened, put several ferrites on your USB cable to squash the high freq noise mucking up the analog portion of your DAC. Then you will hear no difference. Over on HeadFi you will find plenty of posts....
  7. @Miska Please provide more information on the volume control in HQP when playing DSD. I presume it's completely transparent? If so, then hqplayer to DSD cyan could be the ideal.
  8. @Bimmer100, ive been waiting for a digital volume control on a holo...and now i have it in a de-featured product. oh please just spec a CYANx2 PCM with full compensation added.!! or make it an option
  9. On the topic of digital-vs-analog volume and the merits of a pre-amplifier ...yes, it is very strange and its been in my experience that a pre-amp has 'helped' the fidelity of a system. i've heard DAC's with reasonable output stages direct to an amplifier sound much worse than thru a pre-amp. This made no sense to me ...these same DACs that drive headphones to phenomenal levels of transparency fall on their behinds when driving loudspeaker amplifiers directly. These DACs are designed with care to work as a preamp/volume control ....yet when a pre-amp is added to the chain to (amazingly) im
  10. Hey ...guys from old school audio where digital=bad. A digital volume control within the DAC that preserves all the resolution of the samples is now standard across many high-end DACs and, i hope, can be implemented in logic on a R2R DAC. You have too much paranoia from early era implementations where bits got chopped. Nowadays internal bit depths of 32 or 48 bits ensure zero loss. You can always add a downstream pre-amp if you want ...like to provide buffering or impedance matching to the AMP ... but that is where you are adding interference with the analog audio signal. For a simple f
  11. I did a comparison with PSAudio DSJunior vs Hugo2 and found them to be essentially tied for SQ. I gave the edge to H2 for control of complex passages and being dead silent whereas the DSJ always presented an audible hiss - something noted by PSAudio as being inherent in a DSD DAC (and maybe exacerbated by my system specifics). I'm sure the DAVE would widen the gap.
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