@philgo01 what you are asking about is exactly what my experience is (my prior comment above). The Onix transport sends pure DSD64 via I2S to cooperative DACs. In my case, the Denafrips Pontus II 15th was a perfect match. Plenty of other DACs with I2S inputs that work. However, one may need to choose the correct pinout (Onix provides ten distinct settings to try from).
P.S. For a real budget alternative, the Onix also successfully sent pure DSD64 to a SMSL DO200 MK II DAC that I bought on Amazon. SQ was pretty damn good for the price!

