as i bought some HDMI->I2S receiver-board, connected it via some hdmi-cable to my audiophonics-hdmi-extraction-board and got no sound at all 😉 , i just had to get more „in depth“ with the different hdmi-pinouts (namely C1 (PS-audio-standard) and C2..)
on my hdmi-extraction-board i have these description->
„TX_C1„, means the „old“ PS-audio-standard“ with (in short) „Data-“ on Pin 1 (vs. „Data+“ on pin1 in TX_C2)->
so, and as i got a „TX_C1“ (hdmi-sender/transmitter) i just need a „RX_C1“ (hdmi-receiver)->easy as this 😉
needless to say that i bought a „RX_C2“ for my „TX_C1“ 😉
(LINK Aliexpress (14$))
hope that helps a little bit (and i hope i got it right !!) and so we can get a little further in this great „DSD over I2S/HDMI-journey“ 😉 ..
many greets for now !! 😉