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In Reply to: RE: USB done right ?- Intona posted by ahendler on April 08, 2016 at 19:10:52
Isn't the Recovery similer to the Regen?
The Recovery reclocks the USB signal and provides cleaner downstream power than a USB port typically provides. It is transparent to the OS and requires no drivers.
The Regen (and the Schiit Wyred) also reclock the USB signal and provide clean power but they're one-port USB hubs and thus not transparent to the OS. Though the necessary drivers are part of every OS, the devices have still to be enumerated on power up.
A possible benefit of all three devices I've not seen mentioned is that they should also provide clean power to the likes of USB-powered ADCs.
I didn't like the sound of the Wyred powering DACs (I tried a couple) but plan to see how it fares in "upstream mode". Here, though the reclocking facility is redundant, the clean power might be useful given that I've pinched the AQVOX I used to use when digitising LPs. (See above . . .)
Finally, see link for a slightly dated but clear explanation of current limiting and USB design. As ever, not as simple as one might think.
Follow Ups:
"The Recovery reclocks the USB signal and provides cleaner downstream power than a USB port typically provides. It is transparent to the OS and requires no drivers."
The Regen (and the Schiit Wyred) also reclock the USB signal and provide clean power but they're one-port USB hubs and thus not transparent to the OS. Though the necessary drivers are part of every OS, the devices have still to be enumerated on power up."
That is half right and half wrong. The UpTone Audio USB REGEN, the Schitt Audio Wyrd, and the Wyred 4 Sound Recovery all use the exact same Microchip USB2412 hub chip (http://www.microchip.com/wwwproducts/en/USB2412). None of them require drivers for use, though some OSs and DAC drivers are better about initially "seeing" the path through the hub to the DAC than others.
The Recovery differs from the REGEN in its use of a switching regulator for its 5VBUS (not good), common mode chokes on the data line ala Jitterbug (not my cup of tea but some like that sound), noisier TI TPS7A4901 regs (15.4uVrms/72dB PSSR versus the 4.17uVrms/82dB PSSR TPS7A4700 which the REGEN uses two of)--and the Recovery's use of the Crystek CCHD-575 (excellent).
Alex C.
UpTone Audio LLC
http://uptoneaudio.com
the Recovery is similar to the iPurifier 2, except that the latter is more convenient to use and is cheaper (at least in EU).
The dc to dc chip in the iPurifier 2 does seem to affect SQ.
Hudra Z, which is an usb galvanic isolator, a usb regenerator, and outputs audio formats via 2 low jitter XOs.
The isolator is a TI rather than the Si chip in the Itona. The usb regenerator is a field programmed chip, and the usb to I2S ouput is via the so called Fempto XOs. The claim is that the arrangement avoids the added jitter caused by the use of Si barriers in the isolation chip(s).
The sound still changes if you place a Regen or iPurifier 2 before or after it!
Many factors affecting SQ are involved and there is no 'done right' or 'done wrong' piece of hardware or software as proclaimed by some who just assimilate CA or AA posts without qualification..
The claim is that the arrangement avoids the added jitter caused by the use of Si barriers in the isolation chip(s).
Reports and reviews elsewhere suggest that the Audiobyte Hydra is excellent but, at over £1,000 c/w PSU, I'd be getting the jitters so bad myself I'd probably not notice how it was doing.
Whatever, my understanding is that the Intona reclocks after the isolating circuit. Would that not, at least in part, address any jitter induced by that circuit?
I don't believe the Itona reclocks
Alan
It does reclock Alan.
Spread spectrum is just a way of redistributing say 8 kHz noise over a wider bandwidth. Generally ain't good thing.
I stand corrected
Thanks
Alan
It does reclock Alan.
I'm not sure Alan needs reclocking.
Whatever, thanks for the link which I remember reading but couldn't find yesterday as my Internet was down.
Superdad is right and I was definitely wrong in suggesting that the Wyred4Sound RUR was not a one-port hub same as the Schiit and UpTone products.
The difference is that Uptone Audio and Schiit are upfront and clear as to what their product is and does whereas I at least found Wyred4Sound's description rather less straightforward. Disingenuous is too strong a word but IMHO unhelpful isn't.
Nor was it clear even on that slightly odd dedicated but "curated" thread on CA - where's soundchekk when we need him?
OK, OK, I should have checked before buying but I don't think it should be necessary for something so basic. Grrrrrrr.
The bus powered feature isn't a good thing anyway but the price is just not right for a usb port device when compared to other incarnations.
By now you have totted up enough cash to get something like a Hydra Z which isolates, relocks and has cleaned up bus power.
The bus powered feature isn't a good thing anyway but the price is just not right for a usb port device when compared to other incarnations.
I'm not sure which device you're referring to and don't follow your argument. The "one-port hub" USBizmos are not bus powered; the Intona is but, at least in my setup, works very well in spite. As noted above, I had to go to a deal of trouble to improve on the default and then not by much.
. . . you have totted up enough cash to get something like a Hydra Z which isolates, relocks and has cleaned up bus power.
Not sure that's true. I've still got a way to go cost-wise but have an Intona - which isolates, relocks and has cleaned up bus power - on my main system, a Regen on my second system and an RUR I bought in error.
I don't know if the HydraZ performs better than the Intona. Does anyone? It certainly comes in a nicer box but, at three times the price, so it should.
D
The Itona uses 5 1117 regulators which are not great.
What does it relock? Look at the eye patterns for the Si and Ti parts on the web, compare it to the one that Itona posts, and you will see that there isn't that much difference.
What the Hydra Z does is to finally relock the audio streams before output. it's expensive but in the absence of anything else, is worth the money, especuially if you can find a used one.
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