USB reclocker vs DDC?

Thank you, soix.

To what DAC is the Iris attached?

Musician Pegasus.  The other surprising thing is I’m hearing these significant benefits from the Iris and i2S through a very cheap 6” HDMI cable from Monoprice…

https://www.monoprice.com/product?p_id=13578

So, I’m thinking either the HDMI cable doesn’t have much impact on sound with i2S (as long as it’s short) or I’ve got further improvements in store when I upgrade my HDMI cable to something from DH Labs, etc.  

I'm guessing the latter. If you don't mind, let me know what you find if/when you upgrade your HDMI cable. That'll be very interesting.

A couple of years ago, I added a Denafrips Gaia to a Terminator DAC and switched from AES3 to I2S. To start out, I used an $12 HDMI cable from Amazon. This provided a very noticeable improvement over the AES3 connection. 

I later upgraded to a Tubulus Argentus i2s cable ($549) based on favorable reviews. This was an improvement, but not as significant as switching from AES to i2S in the first place. 

@jaytor I read the same thing from others who upgraded their HDMI cables — marginal improvement versus switching to i2S.