USB cable hype

Thanks Sd542. I was originally thinking functionality only because bit errors should be zero in the audio range. But digging deeper, I realize that may not be true. Some USB cables may result in fewer errors than others. In which case, it's not only about functionality but also about SQ.

Cable manufactures aren't doing anything illegal. But I would call it unethical to mislead the customer for profit.

Hi Kijanki, I agree with everything you said except for this one thing: "...jitter does not even apply here".

Just because the source clock isn't used inside the DAC doesn't mean that it has no effect. The DAC clocks data only after it reaches the DAC. The source clocks data up to that point. Source clock jitter combined with cable jitter may err a bit before it reaches the DAC.

For short cable runs, bit errors induced by the cable are unlikely. For long cable runs, bit errors are inevitable. Therefore, the longer the cable and more marginal the source, the more the cable matters for both function and SQ.

Of course, as you mention, a cable may also help SQ by isolating the signal from various noises.

Here is a link showing a good USB eye vs bad eye.

http://www.embeddedstar.com/weblog/2009/06/07/industrial-usb/

Here is a USB chip vendor's failing eye diagram.

http://e2e.ti.com/support/arm/sitara_arm/f/791/p/283089/987150

One eye is open. The other two eyes are closed without a long cable. The good eye doesn't need any help. Any cable will do. The bad eyes need all the help they can get. The cable is critical. Reality is that you aren't searching for that magic touch (whatever that means). You are searching for the cable that does the least harm. Silver will 'sound' better because it is faster. But silver won't sound any better for the open eye.

I have two extra pair of Wireworld Starlight and one Pangea AG USB cable. I cannot tell the difference between these and the basic monoprice cables except that the more expensive ones seem more sturdy. Sound-wise, not a whit of difference. I wish I were able to so I didn't feel dumb spending money for what is basically a give away item.

Lse thanks for the info tho sorry for your situation having spent the extra money with no difference in sound, you have helped me as I will not spend the extra because I have the Monoprice usb already. Also fwiw I think it sounds terrific and I know there is a difference between cables as I have a cable (unmarked) that is far better than a generic usb that I used to use (more body, fuller bass). The Monoprice has terrific bass and smooth detailed highs.