Doc, here is the wikipedia article on USB, there is a bit about 'standard connectors' quite a way down, maybe that is what you need.
Sorry, can't be more help - electronics numpty.

https://en.wikipedia.org/wiki/USB

I am running A40 monoblocks directly from my Hegel HD12 DAC, which does have adjustable volume (in the digital domain). There is a problem with earthing when I attach headphones, this is solved by running the output via the 'Direct' input on a P50sa pre-amp. My main rig is currently all-digital with...

The analogy I would make here is with a digital camera. On my smartphone there is a 5 megapixel camera, But I have another 'proper' camera of 20 MP.

The objects in the photos from both are the same, colours are the same. But one has better fine resolution than the other. The image is more 'lifelike'.

Looks like the judge was just as confused as you.

When I compare King Crimson's latest batch of remasters (done by Steven Wilson) the DVDA 24-bit 96 KHz reproduction has more openness, quietness and 'natural' detail than the standard 16-bit 44.1 KHz CD version of the same mastering. Well, I can hear it anyway.

On the sort of equipment that the average HFS member has there is an audible difference between 16-bit and 24-bit audio: lower noise-floor, imaging, soundstage, detail. But you need a good DAC to hear it.

There are ways of getting DVD Audio tracks into your computer to be played as HQ 24-bit FLAC files.
I've done this with several Porcupine Tree and King Crimson discs.

Computer media-player Foobar can also be set up to play DVDA discs

_D_S_J_R_ wrote:I have no clue I'm afraid. Definitely Orb-like self indulgent noodlings with loads of atmosphere and gentle Frippertronics to balance it.

Hmmm, intriguing. Thanks.

The Audiolab DAC/Pre via SSP interconnect to A80 monoblocks then LS6 speaker wire to Cube 1's ought to do it for that budget (and if you do that I'll be very envious). Take advantage of the NVA 30-day no-quibble (if you don't like it there's something wrong with your ears) refund policy. Should be g...

Got hold of the Sony MDR-EX650AP today - they were on sale. The cheaper EX450 model has an aluminium body but the same 12mm driver. Smooth sound, really good detail/imaging/dynamics, big bass (but not too much, Sony's always pump up the bottom end). I think the best word would be 'luscious'. Excelle...