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In Reply to: RE: UpTone Audio USB Regen posted by ozzyboy on June 23, 2015 at 15:41:18
I've got one coming also. Promised in July. You connect you're USB cable to the Regen and plug the Regen into your dac. It creates a brand new usb signal free of all noise from your computer. People who have them are very positive in there reviews of this device
Alan
Follow Ups:
Guys,
As long as the ground is connected and there is not 100% optical isolation then noise is going to come through. Also NEVER believe anyone that says all or 100% or no jitter... come one even I have been caught on those lines before. Just make sure if you try it and it sounds better than what you have now then it's doing it's job.
A simpler and maybe cheaper better solution would be to make a linear VBUS power supply and use the Corning optical USB cable. The Corning is 100% isolated, but does not have VBUS. If your product does not need VBUS then your set with the cable alone.
G.
J. Gordon Rankin
You won't bother to respond, but to correct you..UpTone NEVER said or make any claims about eliminating ALL noise.They CLEARLY state, if you had checked:
'Although the Regen DOES NOT eliminate all sound quality differences between USB cables in a high-end system, it significantly reduces those differences. John Swenson has written about how the PHY chips and processors at the input of every USB DAC (even those with galvanic isolation) are sensitive to "packet noise modulation" and ground-plane noise—caused by poor signal integrity and impedance mis-matching."
They also make NO claims about zero jitter. But specifically market their product as LOW jitter.
And John Swensen:
"Note: it does not get rid of the packet noise altogether, it is just as low as it can be....
The hub chip inside the REGEN has its own PHYs, which themselves generate packet noise on ITS power and ground planes. I have worked hard to minimize this noise, but it is still there. The result is that the REGEN itself is also sensitive to the SI of the signal fed to it, which is why USB cables on its input still make a difference"
Perhaps a bit of research before commenting?
Edits: 06/25/15
it is actually unclear as to what he was commenting on, other than generality.
assertion, no context or explanation.
Trade mark comment.
not free of all noise, just usb generated noise.
http://mqnplayer.blogspot.co.uk/
Also noise on the 5v power line from computer to Dac
Alan
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