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About jabbr

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  1. Yeah of course the 0.01% metal film SMD resistors are a bit pricey ($15) in small volumes: https://www.mouser.com/ProductDetail/Vishay-Precision-Group-Foil-Resistors/Y16245K00000T9R?qs=sGAEpiMZZMutyvjUqez%2F3ScD3w29bKsRxOtdNkkiL6Y%3D but 0.1% thick film are roughly $0.25
  2. Tee hee hee. What’s a “DBT”? Instead of double blind, you are doing double deaf tests, Tommy! Back to our regularly scheduled permathreads after a note from our sponsors ...
  3. No “they” started out as audio whether digitally sampled and transmitted as streams or to memory Tee hee hee what’s an EE? Shannon and Nyquist sitting a tree...
  4. There you go twisting things again. Did I mention files? I used the term digital stream, you really really just don’t get it. do you? The fact that we are communicating despite the fact that you are upside down is all the substantiation Needed.
  5. You are now changing the topic. My claim is that it is possible to scrub any noise from a digital stream down below an arbitrary level. I’ve also said that sending such a stream across, for example, my own fiberoptic Ethernet segment will remove any such noise on the source and eliminates source effects. I also suspect that, for example, new products such as Sonore’s opticalRendu will also be impervious to the original source stream. These are specific setups that other readers can test for themselves so no one needs to take what I say at face value.
  6. I have worked with a number of classical musicians who judge auditions on their laptops — they can extract & reconstruct the “SQ” from a poor quality recording and played back with terrible speakers!
  7. You don’t need to be an EE or have a degree, rather the ability to read & understand basic physics. Basic. I am not talking about qualifications nor appealing to authority, rather referencing the shared understanding about electronics. Try Khan Academy — it’s terrific.
  8. We are talking about digital electronics, and this should be understood by anyone who has even a slight knowledge of the relevant physics. My “claim” is the standard accepted position. (The statement I made is that noise from the source digital stream can be reduced to an arbitrary level such that bits have no “memory” of where they came from. My claims are hardly unsubstantiated. I am talking basic math & physics, really at an undergrad introductory level. Really old chap you ought to pick up a freshman textbook — this is basic — also read up on what “anecdotal” means.
  9. Not a ladder DAC, a pure DSD input DAC described by @Miska DSC-1 and modified as 1) balanced and 2) output transformers as the analog filter.
  10. Don't take it personally. His sole argument style is argumentum ab auctoritate. He is forced to put down an opposing authority, because otherwise his argument can’t stand on its frail leg. But don’t let him run you off because there are those of us who “only know what they have read in dusty old textbooks” and so we are dependent on the experiences of people like yourself. I know that those waves don’t know whether they are carrying a sound or a code 😉
  11. Ha ha! I don’t have experience with the so-called Femto Ethernet cards, but I have extensive experience with Solarflare, Intel & Mellanox ... all of which have “femto” class clock oscillators. In fact the 100Gbe Ethernet NICs are said to have a jitter tolerance of “zero” and the latest NICs are 200 Gbe and 400 Gbe (Mellanox is current leader) Note that these all have their own on card power distribution networks and are all intended to be supplied by PCI-e / ATX type server supplies and ALL have extremely low jitter so my opinion is that for Ethernet NICs the resources and proven track record of Mellanox, for example, vastly outweighs any audiophile manuf. I think this is what @marce is getting at: non-audio, space, defense etc etc designers are looking at the same low noise, low jitter, low latency parameters that are being discussed for digital audio. At least for Ethernet etc we are decidedly on the high speed digital side of this equation.
  12. Yes, as long as the bits remain identical, any sort of noise on the digital line can be corrected. I don’t care to argue this point, particularly with anecdotes about what someone else heard 30 years ago. The fact that music is now distributed over the Internet dies nothing to reduce the quality of such music (files) in any way. I’m not going to respond to any anecdotal experiences of what people may claim to have heard otherwise. As you say you are not a qualified engineer.
  13. Nothing personal but we’ve been hearing about the “need” to do all sorts of contorted tweaks to our computers to allow them to produce good audio when interfaced to a DAC. LPSUs on the memory banks, SSDs, special cables etc and a new tweak of the week for now years when all this can be solved using a good cheap isolating network.So no I don’t wrap my speaker cables around toroids etc because it’s just not necessary. (good old fashioned heavy iso transformers to supply the audio area remains a good idea, and avoid really crappy SMPS)
  14. Careful ... one could call your non networked system primitive if you want to go down that road. Are you using a real upsampling server or still listening to CDs? Id be very careful about getting high and mighty with whatever other people listen to.
  15. Ah but the latency of that card is trashed by the Solarflare, haven’t you measured that!?
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