Ideal USB cable length, streamer to DAC?

@donquichotte Interesting - hopefully the longer cable works for me too - I just ordered a 1.8m USB cable from Zavfino - it's a standard length (returnable) and I assume (hope) there is a good reason why 1.8m is their standard length (other than it serves the average user in terms of distance between components).

The Uptone USPCB is ideal where it can be used, i.e. no cable but a printed circuit board. Otherwise a 10in Intona cable. Longer cables have reflections and may suffer from RMI/EFI incursions

@kota1 and quality not $$$

I'm returning a $300 Analysis Plus Digital Crystal Cable (COAX) because the no-name USB cable supplied with the DAC sounded better. (I know comparing COAX to USB is not apples to apples).

We'll see how the Zavfino USB performs...the Uptone USB is interesting too....  

There is no direct effect on asynchronous USB delivered data, since no timing is involved (asynchronous), but there might be indirect effect by noise injected into DAC.  This noise might come from ambient electrical noise induced in the cable or computer electrical noise injected into cable.  In first case shortest cable is likely better while in the second case, when computer noise is injected, longer cable might act as a filter for very high frequencies.   What works for one person may not work for another - best to try.