Gustard R26

Meaning both AQ and Wireworld hdmi are meant for video also and hurt nothing.

@baylinor That’s what I thought to initially, but OP might be talking about plugging an HDMI out from a non-i2S source like a DVD player and not just using a standard  HDMI cable from an i2S source. Still not clear on that. Anyway, on impulse I tried plugging my Oppo HDMI out into my Musician Pegasus’ i2S input and nothing happened and in checking further the Oppo’s HDMI out is not compatible with i2S and now I’m concerned I may have damaged my DAC’s i2S input although it still works fine through other inputs. In any event, lesson learned but I sure hope they agree on a standard i2S pin configuration in the near future to help avoid further confusion and frustration. It’s the Wild Wild West in some ways.

Soix, I would not be concerned. Me plugging the PSAudio into the Gustard did not hurt the dac whatsoever even so the connection sounded like a cat's tail stepped on.

Yes I am not talking about the hdmi cable but trying to connect an hdmi output from say a blue Ray into an I2S port is not recommended. Gustard make a bold typed recommendation to not do it. Does that mean it could damage the unit of just the I2S board? I do not know and do not want to find out.

Here is the link to a DDC that the I2S (hdmi) pin configuration can be customized to match a dac pin configuration.