What Digital to Digital Converter Do You Use? Why?

I purchased the Denafrips Iris DDC (installing later this week), but I will be outputting to a Denafrips Pontus II DAC.....which has configurable I2S inputs as well. If you're considering the Iris to the Holo Audio, I'd reach out to Alvin Chee of Vinshine to check on compatibiltiy

According to the designer the USB input on the Holo May is the preferred one so try it until the DAC is broken in.  I have both a May KTE and a Spring 3 KTE and I concur with the designer and see no need personally for a DDC.  Your money though if you have an itch. I would and was more interested in finding the right USB cable.  

Anyone try/use I2S Black Magic MKII from AfterDark

Denafrips IHave been using along time great build quality, great value 

and their whole line up sounds very good ,I own the Aries2,

pontus2 , Terminator 2 , the Terminator 2  makes everything sound great 

even streaming recordings Thst are not that well done , 

better then vinyl in many ways ,their Terminstor+ , i maybe looking into .

I use a Matrix between my Aurender N100H and my PS Audio DAC.  The DDC allows me to feed DSD128 and DSD256 directly to my DAC not that I can really tell the difference.

The 5 volt rail is the weak link with USB because it has the potential to pick up noise from the source.  With the Matrix, if you connect an external linear power supply, it isolates the 5 volt rail from the USB source, and in theory should improve the SQ because the LSU is used as the power source.

I've read on other forums where some people have said the external LSU makes no difference and others that have said it made a big difference.  It occurred to me that everything is dependent on the noise being generated at the source.  For example, the USB out on a PC might be more prone to noise compared to the USB out on the Aurender music server.  Does this make sense to anyone?  BTW, good topic!