USB cables and Galvanic Isolation


I've seen that some Dac manufacturers tout having galvanic isolated usb ports.
Does this mean that the Dac is immune to noise/jitter generated by a computer usb port connected to it?
And will a special noise isolating USB cable be required in this instance?
I've seen a lot of threads touting audiophile usb cables and at present I'm not using one.  I am using an Amazon Basics usb cable from my computer to a Peachtree DACitx.  I have been thinking of upgrading the Peachtree as it was my first external Dac which I am happy with but curious as to how much of a jump in SQ I will hear with a newer more expensive DAC. 
Although, I'm not disappointed in the sound I'm getting from the computer, after reading on-line forums that computers generate a lot of noise and mess with the sound I'm a little leary of usb audio.
nicktheknife

Showing 1 response by antigrunge2

See the ‘USB sucks’ thread: USB generates an unpredictable set of outcomes depending on the implementation of USB ports of the server and DAC, the quality of the cable and the DAC’s clock as well as the noise environment in the specific setup. As such, galvanic insulation at the DAC is only one requirement for decent sound quality, necessary but not sufficient