Widell, Many thanks your very helpful suggestions. I already own a USB anti-jitter device, an M2Tech HiFace2 USB-A to Coax dongle, which is in use right at this moment on my notoriously jittery ancient (2006) iMac, which has been demoted to my bedroom as a TV and Radio, feeding my bedroom audio system. My bedroom system uses an Audiolabs M-DAC, which does not have brilliant re-clocking and/or jitter locking and the HiFace2 improved the sound on that quite a lot, when listening to digital radio streaming from the iMac. I foresee a couple of things. The Jitterbug, like the HiFace2 is USB-A, whereas my 2016 MacBook Pro is solely USB-C. This would mean introducing another dongle into the system, a USB-C to USB-A adapter, with the risk of introducing additional noise and/or signal degradation. I will give it all a try with my my USB-A M2Tech HiFace anti-jitter dongle, to see if there is any improvement. Meantime I have asked AudioQuest if they are intending to bring out a USB-C version of the Jitterbug in the near future. Given that the Hugo 2 is a DAC of considerably higher quality and more modern than the M-DAC, I would be surprised if it did not already include a satisfactory circuit for re-clocking and jitter-locking a USB PCM stream, which would render an external device such as either the Jititerbug or Hiface2, redundant. What do you think?
Wilson