For analog interconnecting cables the system frequency response can be calculated from the electrical properties of the cables (resistance, capacitance and inductance) Different construction geometries and materials such as silver or oxygen free high-purity copper can make a difference. However cables carrying digital signals, such as S/PDIF and HDMI, are effectively immune to signal degradation for the short lengths used in consumer audio. Also HDMI uses error correction which makes errors even less likely. Bit rates (approximately 1 Mbit/s) and distance traveled are substantially lower than for other data transfer technologies therefore any cable appropriately matched to the correct impedance requirement is sufficient. Since jitter is caused by impedance mismatching, the signal deterioration comes about not through corruption of the digital information, but by the process of recovering the clock signal for the DAC performing the conversion.
High end digital cables are a waste of money!