Might try one , was just told RJ45I2S should not be longer than 30cm about 12"" not possible for me .
I don't hear any noise but would like to compare to HDMI
RJ45 I2S-C is LVCMOS, a very low voltage level. It's extremely sensitive to noise.
The RJ45 cable has to be as short as possible, ideally, 5~30cm max.