@belgiangeniusYou won't - USB is a digital signal. Those claiming differences in USB cables are either high or really gullible.
Your statement is partially inaccurate. You're correct that "USB is a digital signal". You're incorrect that "You won't". As you're referring to hearing a difference, one might depending on their hearing acuity, ability of their system to resolve subtleties, and the particular USB cable used.
USB cables come in different lengths, can be made of different material, can have different insulation, can have a different dielectric, can include a voltage isolator, can be subjected to different environmental situations simply by their orientation to other wires, EMI and RFI fields, can have different types (material) of connectors, can be of a different wire gauge, as well as other things I'm forgetting at the moment. All of the aforementioned can affect the resulting sound, despite the fact that it may not - but could - have an effect on the 1's and 0's.
Best.
Hal