In Reply to: RE: An insolent provocation .... if a usb dac is very well design (and built) the pc quality should not matter posted by Thorsten on December 11, 2014 at 00:18:01:
No, I have no magic solution, just using multiple stages of isolation. I think the bulk can be done with optical isolators. I suspect pulse transformers will work as well, depending on the signal coding due to the problem of passing DC. The last stages of buffering will require hard flip flops and very very careful power and ground distribution.
The first problem is to characterize the situation, i.e. to see what people are hearing and how sensitive they are. Then the second part of the problem is to figure out how to measure this reliably, including measuring isolation from the source.
If I were you, I would look for people who design high speed crypto equipment (red black separation). They probably have this problem pretty well nailed, since their goal includes preventing any information from leaking other than the intended bits.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
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Follow Ups
- RE: An insolent provocation .... if a usb dac is very well design (and built) the pc quality should not matter - Tony Lauck 07:52:16 12/11/14 (10)
- RE: An insolent provocation .... if a usb dac is very well design (and built) the pc quality should not matter - Thorsten 20:28:30 12/11/14 (9)
- RE: An insolent provocation .... if a usb dac is very well design (and built) the pc quality should not matter - Tony Lauck 14:00:00 12/17/14 (1)
- RE: An insolent provocation .... if a usb dac is very well design (and built) the pc quality should not matter - Thorsten 17:11:49 12/17/14 (0)
- RE: An insolent provocation .... if a usb dac is very well design (and built) the pc quality should not matter - audioengr 11:09:27 12/13/14 (2)
- RE: An insolent provocation .... if a usb dac is very well design (and built) the pc quality should not matter - Thorsten 22:39:21 12/13/14 (1)
- RE: An insolent provocation .... if a usb dac is very well design (and built) the pc quality should not matter - audioengr 11:38:03 12/14/14 (0)
- RE: An insolent provocation .... if a usb dac is very well design (and built) the pc quality should not matter - Tony Lauck 10:35:53 12/12/14 (3)
- RE: An insolent provocation .... if a usb dac is very well design (and built) the pc quality should not matter - Thorsten 03:52:07 12/13/14 (2)
- RE: An insolent provocation .... if a usb dac is very well design (and built) the pc quality should not matter - Tony Lauck 09:41:08 12/13/14 (1)
- RE: An insolent provocation .... if a usb dac is very well design (and built) the pc quality should not matter - Thorsten 10:39:18 12/13/14 (0)