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Blackmorec

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  1. OK, tell me how vibration interacts with silicon to change its output? Texas Instruments tested it and proved the effect
  2. When sound quality improvements are reproducible yet contradict someone’s current knowledge and understanding or the medium, its the knowledge and understanding that is incomplete. Claiming that reproducible improvements can come from the imagination is obviously illogical. Your knowledge and understanding of domestic audio reproduction led you to state that it is relatively simple. Logically the only way for that conclusion to be reached is for the knowledge and understanding to be simple i.e likely missing information about the complex interactions between all the various elements I mentioned in my original post
  3. Do you understand the concept of reproducible? It means that something is the same every single time.....not imagined to be the same....THE SAME.....reproducible. And how would you know its THE SAME? By doing confirmatory testing. And you think domestic audio is relatively simple? Recording, electronics, networking, software, transduction, materials science, acoustics, psychoacoustics...Yep, that certainly sounds simple to me. The very fact that you think its simple just proves the very point I was making. 😊
  4. Hi Allan, I agree with what you say, but would like to discuss the concept of soundstage. In your priorities you list resolution of detail. Essentially resolving detail is about resolving the differences between very closely related sounds. Let’s think about those differences for a moment; We obviously have frequencies and the frequency spectrum, timing and amplitude, but for me, no less important is space or placement. If you have 2 voices (ie the same voice multitracked) that are identical in frequency and timing, you will only hear one voice unless they have different timing and/or different placement in space. Placement in space is soundstaging, so if resolution is a critical priority for you, accurate soundstaging (or placement in space) is one of the main areas of differentiation . An example. Very often in poorly resolving hi-fi you will hear female vocals or violins that sound slightly harsh and annoying. Replay that same recording on a highly resolving system with good soundstaging and those female vocals resolve into the voice and the venue ambience. Although the frequencies and timing are similar the position of each is very different so you hear them as 2 separate events or sound entities and that’s why soundstaging is important....it allows you to better differentiate closely related details.
  5. Using knowledge and understanding while ignoring direct evidence from your ears would disqualify you as an audiophile. There will almost certainly be times when what you hear contradicts what you know and think you understand. For example, that USB cables can affect SQ. When that’s the case, and you confirm that what you’re hearing is reproducible, then the ONLY logical explanation is that your knowledge and understanding are incomplete. Some people here think that we know everything about electricity and electronics but I would say that, given our progress over the last 100 years, it is highly unlikely that we know everything there is to know, or frankly even close to it. The Universe is a very complex place with a lot of phenomena we can observe but in no way yet understand so the progress we’ve made is likely to continue for a long time yet. Believing we know it all is IMO, just naive. Digital audio is, again IMO rife with misunderstandings. I don’t have the answers but I and many others are constantly encountering contradictions where facts, evidence and outcomes don’t perfectly match. Hopefully they will lead to further investigations, new measurements and improved understandings. But as long as those dichotomies exists, there will always be 3 camps in audio 1. The subjectivists, who base everything solely on what they hear 2. The objectivists, who base everything on what they think they know and can measure 3. The realists, who observe that what we know and can measure doesn’t always perfectly match what we hear, so recognise that our knowledge and expertise has shortcomings.
  6. Initially my ISP Virgin installed a Superhub3 combination cable modem and router. It came with a funky little 12V SMPS brick. The Superhub3 is anything but super, with bugs in it’s chip set’s OS that triggers a rash of diagnostic routines whenever workload increases beyond a certain point 😩 I’m forced by Virgin to retain the Superhub as a modem, but I installed a TPLink AC5400 Archer router with the Superhub switched to Modem only mode. The TPLink has a lot of features to optimise speed and efficiency and the control software really does allow the user to set up a customised set of networks. Offering 3 bands, I dedicate one 5GHz band to audio, with no other clients, the 2.4GHz band to roaming internet devices like iPads and phones and the 2nd 5GHz band to fixed internet clients like UHD Video streaming, CCTV security cameras etc. To ensure an optimum signal to my hi-fi I installed a TPLink RE650 extender, a 2 band device that can be configured to only receive the incoming 5GHz stream from the router and send it down an ethernet cable. 5GHz polling and the entire 2.4GHz band can be switched off, as can all the LEDs. The ethernet cable is connected to an AQVox SE switch. The Modem, Router, Extender and Switch are all powered by DC3 Linear Power Supplies. Virgin provides 500mbps internet and I reliably receive over 400mbps to my hi-fi. While music streaming doesn’t require anything like this speed, the iPad based GUI for my server benefits hugely, reacting almost instantaneously, like you’d expect from a local hardwired controller. When you’re dealing with the artwork of thousands of albums things can get slow pretty darned quickly, so I really appreciate the performance when browsing albums and streaming from Qobuz for example.
  7. The are 2 ways to make improvements in hi-fi 1. Obtain more detail and accuracy from the source material i.e record grooves, magnetic tape, computer bits or 2. Remove noise, distortions and resolution losses that mask and hide detail (analog) or interferences that negatively impact detail recovery (digital). Both 1 & 2 will give improved sound quality and both sound similar so its only possible to differentiate by looking at what was done to achieve the improvement. Improving a turntable, cartridge, CD transport, tape deck, DAC etc will recover more detail, more accurately (1). Improving power supplies, amplifiers, speakers, cables, vibration control, mains treatments etc will unmask and reveal hidden detail in line with 2. When a USB cable gives a deeper, wider soundstage or more luscious midrange....it actually doesn’t. What is does is to not allow ingress to the interferences that might otherwise damage the soundstage and midrange perception elsewhere in the system (usually the DAC). The improvements aren’t added....they’re already there, in the bit stream, just masked. Both soundstage perception and midrange judgements happen in the head and can result from minuscule changes in the final analog signal, so it doesn’t take much to introduce disturbances that impair a system’s performance. All systems are impaired...some a little and some a lot. There is no way to add detail that wasn’t extracted from the source...it is however possible to unmask detail that was previously buried in noise or unresolved due to problems later in the processing chain. So in summary, an ‘improved’ USB cable increases SQ indirectly by preventing the ingress of interference that negatively affects SQ later in the chain
  8. Oh boy....completely misinformed, as usual. https://uptoneaudio.com/pages/j-swenson-tech-corner
  9. Well that obviously that went right over your head, like most of this stuff appears to be doing. Both your water supply and your music stream travel along a myriad of pipes and cables before reaching your home. When they reach your home they both have a level of contamination and while both can be used directly, as is, both highly benefit from some clean-up. Once cleaned up both ‘taste’ better....one makes better music, the other better washing water, potable water, tea, coffee or whatever. Both can be cleaned up by short runs of specially engineered ‘piping’, namely filters Both are easily recontaminated, one by contaminated house piping and appliances, the other by EMI, RFI, poor quality power supplies, poorly executed oscillators, noisy mains etc. All you need do to educate yourself is to read some of John Swenson’s work...available here on the sponsored Uptone Audio Forum.... .most of this stuff is covered and I highly recommend it.
  10. Lets take your first underlined paragraph. I now have a beautiful clean signal reaching my DAC from my USB port, absolutely perfect, couldn't be better with no jitter and perfect signal timing. What arrives at your DAC depends entirely on what leaves your USB port. The cable only transports it. So by definition, all Audiostream.com are describing is the quality of the signal that appears at your USB port. All those cables have done is to transport it while doing minimal damage. If you were to hardwire your USB output to your DAC without any cable, what you should hear should be a combination of both descriptions, because the signal has to incorporate both sets of qualities before its transmitted along the cables, since neither cable can add those qualities, they must have been there before hand and all these cables are doing is not losing them to the same degree as others.
  11. Which other area do we actually listen to the results, so surely the better questions are; how come we can actually hear differences? Or; What is it about our hearing that makes us so sensitive to these anomalies? My goal for over 40 years has been to have a system that is completely immersive and 100% musically convincing. I have found this goal to be very illusive and only achieved with the utmost care. One false move and its gone. I have heard literally hundreds of systems and have heard my goal realised on only very few occasions. The replacement of a single DC cable is sometimes enough to rob the system of its magic, so we’re not talking major anomalies. Close to perfect music from an audio system is in my experience a very rarely encountered quality.
  12. OK, lets start again. No passive cable enhances SQ. How could it if its passive?. What cables do is to subtract. A cable that subtracts NOTHING (which to my knowledge doesn’t yet exist) would be considered and judged to be one of the best cables in the World. Here’s how it works Lets say I transmit a perfect signal at 100% and I have 2 cables. One loses 5% of the performance and the other 15%, so instead of 100% I’m going to hear 85% and 95% perfection so one cable is going to sound a lot better than the other. This is an oversimplification simply to illustrate the concept. All the items you mentioned above....Jitter, reflection, impedance mismatch, RFI and EMI, phase noise......non of which are likely to cause bit errors, will all cause problems of one sort or another with components in the DAC. There’s enough published technical information about how these issues are caused if you care to look. So a really cruddy stream arrives at your house, with noise, jitter etc. It goes through a number of cleanup steps to remove noise and reconstruct the timing to remove jitter. This pristine signal is then sent to the USB output. If that has a decent clock and power supply then a good signal is fed into the cable. If the cable is sufficiently screened, has the correct impedance, picks up no EMI or RFI etc then a good clean stream arrives at your DAC. A poor cable on the other hand will deliver a distorted and contaminated stream that causes your DAC problems. This is not an issue about bit stream errors...its noise and timing issues that cause the problems. Feed a DAC a perfect bit stream i.e all bits present and there’s no guarantee you’ll get great sound. It has to be a clean, error free, contaminant free bit stream to achieve excellent results.
  13. You really don’t get this do you, which is why I’m having a hard time with the PhD. The problem isn’t 1110011....the problem is all the hf noise and phase noise that go along with it. There’s no such thing as 1110011 in an electrical circuit. Its all analog voltages that REPRESENT 1s and 0s
  14. If the bits are mistimed, you get Jitter and if you get jitter you get phase noise. The point is, if there’s analog noise mixed in with an analog signal, there’s not a lot you can do, because you cant differentiate one from another whereas a digital signal can be reformatted without losing any of its audio integrity. But once you’ve cleaned and reformatted the digital stream you don’t want it recontaminated or mistimed by EMI, poor quality oscillators etc etc which is where the cables comes in. Its passive so it can’t enhance anything but it sure as hell can detract.
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