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Computer Audiophile


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About YashN

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  1. I thought that 'floating SMPS' was actually using John's output-grounding trick on an existing SMPS. Doesn't seem like it is judging by your response? Would it be one where this grounding is already implemented? No idea, I don't care much about SMPSes anymore I may still give the output-grounding a try and listen in my setup, especially at the DAC power side: this is where I have several configurations I can test and listen to. However, it might be a while until I get time and will to do this.
  2. That would be the output-grounding trick by John? Worth a try for sure. Does it totally interrupt leakage currents? AC-side pollution, etc...?
  3. iPhones have been manufactured in Asia too, so there shouldn't be any definite conclusion as to the country of origin, it's more about the nature of the PSU itself. I'll take a Simple Linear over an SMPS any day for audio, a Swenson Linear over any other Linears. Still haven't experimented with Salas-type PSUs though, that would be next on my list of things to do (too many to mention). Hope Sydney's is great as Summer's here.
  4. It's way, way more than that... Build one. Listen (especially if you can compare to a DAC which by default is USB-bus powered in a direct connection to a computer). I did. I did use a 317 myself as this is what I had on hand, but his original reg is much better (and there are probably much better ones nowadays). In my build I did several iterations post-reg until I was happy with the results - problem here is the 317 is not very good so you end up battling non-linearities because of capacitors and their interactions with that Reg.
  5. YashN

    Album of the Evening

    Got a lot of cheap second-hand CDs this Spring. Last spring was a new one for me while hunting for cheap CDs: as the day was closing, the owner of a shop just told us to take anything we wanted from the discounted area (books and CDs) for free(!). So, last year I got a whole set of Rock & Roll CDs, like Silverchair, etc... that I probably wouldn't have thought of buying for myself in the first place. Really glad to get a new Dead Can Dance compilation album this time: I think I have amassed around 7 albums from them, so I probably have all of these songs except for the two new ones on this compilation. Very, very glad to still be able to discover and appreciate bands I wasn't listening to before. Brendan Perry's voice is quite unique. These songs are filled with spiritual devotion.
  6. What's up? Tell me about it. Been looking for some new cool gear to do multi-track recordings in my studio. Can you believe one manufacturer went from a Linear PSU to an SMPS in a new model of a multi-track interface and thinks they resolved an overheating issue like that? So now, this is quite a common issue I have seen on the production side of things lately: various SMPS used in different pieces of equipment, even some new(ish) synths. Mind-boggling, really.
  7. I did recording captures at the DAC output, using a pure Sine generated by Audacity using the M-Audio Fast Track Pro as capture interface, then did FFT on the results. Maybe you missed those? That's in and for my system. Not ideal for sure (I did mention caveats in my post). For good measurements, go ahead and do the same in your own system. I am fairly sure you have better measuring gear than I do. I disagree with your perception of 'no rational explanation': from what I gather it is the same phenomenon by which grounding works within a system, apart from the intriguing thing that some people mention with Entreq, i.e. it takes some time for the effect to come on. I haven't experienced this in my system: the external 'grounding' effect occurs immediately. So for my own experiments: I see nothing other than the simple contraption allowing dirty currents away from areas where they were previously wreaking sonic havoc. It's nothing more than improving returns IMO, so no exotic or new physics is needed here (apart from that thing above). What's not needed though is the bookish statism and inherent misconclusions ("this shouldn't make a difference, therefore this doesn't work"). @PeterST has done a lot of measurements exactly like that, especially at the computer-side planes IIRC. As for me, I have nowhere near the gear I'd like to do extensive and more precise measurements but you probably do, don't you? So the captures and FFT are what they are. I agree. However, I am not publishing any paper here. Try it for yourself like in a build, listen, and make your own conclusions and measurements. You may not have any better sound, but that's fine too by me: it might be that your system already is properly grounded throughout, so no additional benefit can be obtained.
  8. You'd lose a lot of money, unfortunately. Knowing Digital circuitry doesn't make one an automatic expert in analogue circuits. Computer Audiophillia is about Mixed signal circuits and EMC. The issues we get are almost always where assumptions about Digital and Analogue are wrongly adopted or when the Digital viewpoint of robustness of transmission doesn't take into account any intermediate D/A and all the analogue issues that can accompany transmission in the analogue domain. By now, attentive people reading here should know more about both USB and any intermediate A/D and D/A steps from reading a file on an HDD or elsewhere through to the DAC then onto Speakers. There are many such steps, each can be damaging to sound. All we get from this supposed 'expert' still polluting this thread is how he thinks things should work. Better stick to digital if that's all he knows about.
  9. There can be a lot of different implementations here. Mine has been iterated upon quite a lot and always makes a positive difference, be it on audio or on video. In fact, I recently removed it and despite all the other filtering and customisation/isolation between the computer and the external USB DAC, the holographic, detailed, 'they-are-here' effect is gone. The system still sounds good, but I know it's several levels below its potential.
  10. YashN

    Blue or red pill?

    Absolutely This is why I've mentioned a few times that: Bit-perfection is necessary but not sufficient, that there's a need to go... Beyond Bit-perfect There are things you can understand just by trying out an early version of BugHead Green and looking at its source code (or understanding what the author says it does if you can't read the code), and also read this carefully (read all parts): Q & A with John Swenson So, software, hardware, networking, cables, your filtering or power or lack thereof, vibrations, suspect 'grounding' within a device in the system or among devices all matter, a lot... The whole system has to be taken into account. And it is also why I coined the term 'Noise profile of processing a bit' in the system, as it is a shortcut model which makes sense to me. For more of what @PeterSt has investigated deeply in his systems and what he found out, see here (may not seem related judging by the title, but see where the conversation brings us - there's a lot of great things to learn from the thread): DDR3 Flipping bits..
  11. YashN

    Album of the Evening

    This should really be 'album of the year'. I have re-listened to this album (re-discovering it with my custom USB filter + custom USB Connector + DIY Linear Regulated PSU + AC Filter Box + DIY SET Tube Amp) last year many, many times while geeking out on my code, AI, electronics and what not. This album, these songs remind me of my youth where the world was rich with possibilities, those of technology, of science, of computers, circuits, synthesizers, when studying these was so pure and brought much happiness, and the clean synthesized sounds of British New Wave, together with other wonderful pieces by Italian, French and German bands. Tears For Fears - The Hurting What a beautiful album. The synthesizers are there. But although there are guitars too, they find their proper place as the songs are more than the sometimes simplistic naive romantic songs of early Brit New Wave (which in their own fashion are also beautiful). Now, for me though, there's one piece that I have to remove from the album when listening to it, as it clashes against the refined pop of the others. It's 'The Prisoner'. It grates for me, it might not for you. This album also does in fact, in the feelings evoked and the songs and the subject matter, represent escapism for me. There might be an odd form of coincidence here. In this album, TFF already showed a rather sophisticated flair for songwriting, confirmed later with their other smash hit follow-up album and some of the later ones too.
  12. Absolutely, these fields are dynamic, not static, as people perfect heir knowledge and their models of the domains they are investigating. Totally agree with you, Alex.
  13. You make no sense at all, so I have no idea what you're talking about. If you have proper engineering facts, do post them. There are a handful of questions I have asked you which you haven't replied to earlier in this thread. Also, if you are the one who wants to post 'corrections and engineering facts', by all means, do so, as I did appreciate you taking the time listing a lot of interesting resources, namely books. However, you also made a mistake about how the return paths work, for which I had to correct you about. Maybe that's why you're bitter about something? If you're so bent on quoting your book knowledge, make sure you quote it properly. If you're talking about marce supposedly offering corrections or engineering facts, well that's entertainment to me because all he did a few posts back if something like 'I thought USB would work like this' or whatever (it's unimportant - he hasn't done the work, he doesn't know but if you really want to know what he posted, just scroll back).
  14. It's both, but most of the issues are issues related to the interference one has on another. It really is, overall, an electrical problem. And that's why understanding the System itself is what makes you progress on this path. Additionally, there is 'analogue' hidden in what we call 'digital'. This a big source of the issues. Digital people aren't too concerned with the EMI/RFI for audiophile purposes that their digital circuits make: they mostly design to pass a threshold of acceptance which is far less demanding that what audiophilia field requires. The real question here is: why didn't you think this was already a given? I think you've been around this forum a while, no? You mean you haven't seen people in their threads asking Chris to purge their threads of some drivel? The OP has this leeway provided and acted upon by Chris himself.
  15. I know! It was also just an example. I also know that if you, jabbr, put your mind to it, you'd be successful at it, so then, I wouldn't mind if you were offering. I'm pretty well-served here as this is what I did: - I spent a lot of time dissecting the posts by people who actually bought one of the Entreq boxes, and one of the Tripoint boxes on WBF. - I spent time researching, studying, building, testing, setting up critical listening sessions where 1 (me) or 2 persons could listen and discuss their findings. - I built a really, really rudimentary 'signal grounding' apparatus to just quickly invalidate it... well, it wasn't invalidated at all. I was suprised - I built my own AC Filter box - I built my own Custom USB Connector - I built my own very Low-Noise Linear Regulated PSU for the DAC. Since then, I also built a Dual-Rail one for a Modular Synthesizer, using the same technologies So now, since I used various combinations thereof in my system, I know precisely what the so-called 'signal grounding' box does, at least part of it. There's another part which is intriguing, but which I haven't experienced. If anyone has been paying attention, @JohnSwenson , on another thread has shown a simple method to reduce the noisy effects of an SMPS on your setup... If you compare this method with my rudimentary 'signal grounding' and what the Entreq box does, it amounts to a similar thing. This is why I was asking early in the thread whether just linking the chassis of the gear would solve those problems of noisy currents. Speedskater thought that would be the case. In my setup, I found it wasn't enough. Despite also integrating my AC FIlter box (so Chassis interlink + AC Filter Box), that external 'grounding' (I think 'external reference' here would be a better term) still made a difference in sound. This device wasn't expensive to do at all since my only goal here was to rapidly invalidate it: make the simplest form of it I can think of, connect it, listen, and discard the thing as I thought it wouldn't have any effect. Well, we know what happened there. The device as described a couple of times before in this thread is simply this: - a copper tube that I found for cheap at a hardware store here - the shield from a cheap satellite cable that I found there as well, and flattened That's barely CAD3, maybe $2 max. The point is that I actually tested the thing a while ago in my setup rather than just contemplate in my mind why for theoretical reasons 'this shouldn't work' as so many have been prone to do. The first time I did this I was already flabbergasted: I had built my own power cable based on a Chris VenHaus design. Didn't expect anything at all: after all it's power, just plug it in, right? If you were trained in Science and Engineering, you take the information, you test it out or try to invalidate it. If you invalidate it, then there's no need to spend more time on it. On the other hand, if you don't invalidate it, then this becomes an interesting pursuit to do further investigations on. At least that's what I do. I learnt a lot doing that and I never viewed Science as a static corpus of knowledge