Popular Post jabbr Posted May 3, 2020 Popular Post Share Posted May 3, 2020 1 hour ago, The Computer Audiophile said: An option I should also note, that I was reminded of by Ed Meitner via Skype last week, is optical isolation between the PC and DAC. He is a huge fan of this. One of his guys sent me links to optical USB cables that I’d long forgotten about. I may get a couple in to test. Be sure its a true optical only cable -- the Corning fiber USB cable from several years ago was powered from the source, so a hybrid fiber/copper. There are new fiber thunderbolt cables that use the USB-C connector -- I don't know if they can do USB also -- each end powers its own end. Audiophile Neuroscience, The Computer Audiophile and jolon 2 1 Custom room treatments for headphone users. Link to comment
jabbr Posted May 4, 2020 Share Posted May 4, 2020 6 minutes ago, Audiophile Neuroscience said: Corning appears to still offer the hybrid copper fiber cable looking at their website and FAQ "Do USB 3.Optical™ Cables by Corning contain copper conductors? Yes, two copper conductors transmit power from the host for the optical to electrical conversion and back again. All data is transmitted over the optical fibers" This may be a possibility 10 meters USB 3.0 Active Optical Cables, USB AOC Look at the Corning Thunderbolt 3 cables -- which are different. They *might* work but I'm not sure. Audiophile Neuroscience 1 Custom room treatments for headphone users. Link to comment
jabbr Posted May 4, 2020 Share Posted May 4, 2020 I think this USB/thunderbolt is very confusing -- see: https://www.extremetech.com/computing/286861-thunderbolt-3-rebranded-as-usb4-coming-2021 The problem is that there are cable compatibility issues so I can't say that the Corning fiberoptic Thunderbolt 3/USB4 cable will work with a USB DAC input -- someone needs to try Audiophile Neuroscience 1 Custom room treatments for headphone users. Link to comment
jabbr Posted May 4, 2020 Share Posted May 4, 2020 21 minutes ago, sb6 said: Curious if anyone considered any inherent noise/jitter associated with the 2x optical conversion and whether this might reduce or adversely affect sonics versus the benefit of optical isolation? Many people have looked at fiberoptic Ethernet -- for 10Gbe and faster, the amount of jitter is tightly specified to be < hundreds of femtoseconds, slow Ethernet did not have such tight specifications because the specs are very old -- these current modules are not your grandmother's optical converters Custom room treatments for headphone users. Link to comment
jabbr Posted May 5, 2020 Share Posted May 5, 2020 1 hour ago, Audiophile Neuroscience said: If you look for example at an ethernet bridge solution to introduce optical into the pathway between pc and DAC it is fairly convoluted, let alone the cost. Your selection is way more complicated and expensive than it need be. First the opticalRendu is the majority of the cost. You could get a switch with an SFP port, connect that to the oR and be done with it. Zero need for the other stuff. The 10Gbe Mikrotik is excellent and cost effective. People will have preferences and that’s their preference but no fault f fiberoptic Ethernet which is cheap and effective. Audiophile Neuroscience 1 Custom room treatments for headphone users. Link to comment
jabbr Posted May 5, 2020 Share Posted May 5, 2020 4 hours ago, Miska said: Most of the network jitter is from higher level rather than from the media level. Entirely agree ... there is also a fiction that optical transceivers inherently add jitter eg TOSLINK and the typical optó isolators — my point is that SFP(+) modules don’t nor do switches. If it mattered it still wouldn’t be an issue. Custom room treatments for headphone users. Link to comment
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