There is a huge difference between processing /converting signals and digitally transporting them. The cable quality addresses only the transportation of the digital information (0's and 1's or high voltage and low voltage square wave pulses). As long as the cable impedance and the junction potential of its terminals keep the high voltage pulses safely over the defined threshold, then no audible difference will be noticed regardlessof the cable cost. There are many low cost cables that will fulfill this requirement. As a rule of thumb, be careful with cable length, because cable impedance increases with it and signal voltages will be attenuated as its result.
Enjoy playing and sculpting music!