USB cable..what do you have.

I have the LOcus Designs "Polestar" cable which Jb might be refering to: I think it retails for 249. I did not compare a bunch of cords, but found it to be a noticable improvement over the "stock" cable I had connecting my MAC to DAC. It was recommended to me by another high end wire manufacturer who I think very well of. John

Larry_s, cable-induced jitter is a reality. The cable won't "slow down" the bits, like traffic will slow down on a highway. Reflections in non-uniform and ill-terminated cables will change the shape of the signal and that will impact WHEN transitions through zero occur, and that's where the bits are encoded.
Jitter is not a uniform slow-down, is that transitions are not time-equidistant.
I know that many will consider digital interconnects snake oil. I've been in that camp too until reality forced me to face it.
Only the fact that my DAC uses asynchronous USB allowed me to use the cheapest cable sent by W4S. With all other DACs the quality of the digital interconnect had a significant say.
Of course, you may choose to disregard everything I said, that's your privilege and I respect that.
I'm not selling cables here, I'm only sharing an opinion which grew from experience and some technical background.

Here is a white-paper on sources of jitter:

http://www.positive-feedback.com/Issue43/jitter.htm

Not all asyc USB interfaces are immune to jitter BTW.

Steve N.
Empirical Audio

Thank you, Steve.

Could you, please, elaborate a bit on "Not all asyc USB interfaces are immune to jitter BTW"? I'd like to understand.
I might be wrong, but if the connection is asynchronous, that means that there is no timing sent through it, thus no interface jitter exists.
Jitter from the ADC itself will be there, in the data itself, that's clear, same for the jitter of the DAC's own clock, but that's not what I was referring to.
I meant that transport and interconnect jitter will be out of the picture in the async USB case.
Where am I wrong?

I'm in for a Locus Design Cynosure. I've worked my way through their line and have noticed leaps and bounds improvements all the way up. I'm thrilled with the product, and with Lee's generous upgrade policy.