From experience with several dcc upsampler the $280 Wireworld
is a excellent hdmi-IS2 cable and pin match out was spot on.and sounds great.
Which HDMI cable for I2S?
I'm currently using an inexpensive 12 inch long Monoprice cable to connect my dac to a Gustard U18 interface. Honestly, it sounds quite good.
I don't want to buy a pricey cable, but maybe something by DH Labs, etc.
There are some deals on older cables that meet HDMI 1.3, 1.4, or 2.0 standards. I know these standards are for video. Would all of them work for I2S digital audio? Would the higher standard HDMI 2.1 be better?