Popular Post Superdad Posted February 21, 2020 Popular Post Share Posted February 21, 2020 On 2/16/2020 at 11:02 AM, PeterSt said: Do notice that the AllDaq is USB3 which the Intona IMO is not (unless by now it is) and that the ISO REGEN also is not (USB2). Hi Peter: The AllDaq uses the same discontinued Silanna ICE08USB isolator as we use in the ISO REGEN (And of course we were the first to tame this problematic part and to pair it with a USB hub chip; We shared our methods--for making the part work with async USB audio--with Silanna, and they turned around and gave that information to another, larger audio OEM they were courting and who were staring to work with the chip. I won't name names, but you already know this story.) The AllDaq puts a hub chip on both the upstream and downstream side of the Silanna. (Our ISO REGEN uses just one hub chip, plus a total of 5 LT3042 regs.) But they do not use a premium clock or ultra-low-noise voltage regulation--as their piece is not aimed at the audio market. On 2/16/2020 at 11:49 AM, Yoshimitsu said: Should i decide to buy an Intona i would buy one of the newer models which they claim is much superior and that would be indeed around the same price of the ISO Regen. I have not examined the new Intona, but I suspect it is a very fine unit. Their original model was not designed with audio in mind (the average clock was on the upstream side, the regs were nothing special at all), but they did crack the code USB ULPI interface, writing their own FPGA code to handle the single-pair, bi-directional data so that they could put USB across standard uni-directional digital isolator channels. But no reclocking flops so the jitter from the isolators got baked in. But then, thanks to Peter and other audiophiles, the Intona was discovered as a reliable galvanic isolator, and I think nearly all their sales ended up being into the audio market. So they were smart and refined the design to be more optimal for audio. Again, I do not know what is in their new unit. We are purposely not looking as we have our own plans for the future and want to stay clean. On 2/16/2020 at 11:49 AM, Yoshimitsu said: There is also a japanese Isolator https://www.fa.hdl.co.jp/en/isolator/en-highspeed/en-usb029h2rp.html Also around the same price, uses an IC repeater if i understand correctly instead of a reclocker i asked them and they answered me "USB-029H2-RP is used USB hub controller as as a reclocking stage. It has been observed that the USB hub controller exhibit the best output jitter performance on their USB 2.0 data lines." Nothing to see there. The HumanData unit is another industrial piece with Silanna hub chip fronting a USB hub chip. On 2/16/2020 at 11:49 AM, Yoshimitsu said: What do you mean by 1000s? Peter what just referring to the fact that UpTone has sold about 2,000 ISO REGENs (plus almost 4,000 of our original USB REGEN). And we are experienced with these in audio systems of all types. We know what works, what doesn't, and how to get the best from these connections. On 2/16/2020 at 11:53 PM, motberg said: I have had the Uptone ISORegen, an Industrial Intona (first version), and the Singxer UIP-1 . https://shenzhenaudio.com/products/singxer-uip-1-isolate-processor-usb2-0-usb-interface?_pos=1&_sid=6fb180caf&_ss=r I like the Singxer folks (use their SU-1 DDC for USB to I2S in my own system), but for their UIP-1 we would be happy to go toe-to-toe on technical design and parts cost and performance. On 2/16/2020 at 11:53 PM, motberg said: The Uptone did not work in my system and there were pretty many reports that some users could not get the isolation to work. True galvanic isolation with USB is a tricky thing. The USB standard was designed with a good ground reference expected. The USB input of some DACs are sensitive and will drop connection with the least hiccup. And the Silanna chip is not perfect. But only about 10% of ISO REGEN users report not being able to use the full galvanic isolation of our ISO REGEN. Those users simply have to put its red switch into the up ('ON') position to defeat the GI. Yet GI is only about 15% of the overall "goodness" of our design. Exceptional signal integrity, impedance match, and clocking are all still there in spades. On 2/16/2020 at 11:53 PM, motberg said: If I was buying today, I would probably go for the new Intona. As mentioned, the new Intona is likely an excellent piece. On 2/16/2020 at 11:53 PM, motberg said: Ifi also has an isolator. https://ifi-audio.com/products/nano-igalvanic3-0/ It too is Silanna plus hub chip based. And it has a 3-position switch to defeat the problematic galvanic isolation. I have an iGalvanic unit here, and like a lot of users (search the web) the full isolation middle position of the switch is rarely usable. Plus they went to a lot of effort to make their unit entirely bus-powered, but it alone consumes about 380mA and does not leave much VBUS current for whatever DAC is connected. Thus they often bundle it with their iPower SMPS wall-wart, which sort of defeats the purpose... opus101, Yoshimitsu and Matias 1 2 UpTone Audio LLC Link to comment
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