PC / USB / DAC clocking

[Lavawood]

What is the best USB signal from a PC?

is a product like this overkill?

https://www.ebay.com/itm/Audiophile...noa=1&pg=2047675&_trksid=p2047675.c100623.m-1


I use a filter card only, is a clock superfluous?

 

[Blumlein 88]

Waste of your money.

USB to Dac is asynchronous. The clocking out of the data is done by a free running crystal at the Dac. The lowest jitter way to run a clock. Unless you have an early Shitt Dac which wasn't well isolated from USB you don't need or benefit from these add ons.