I2s DSD

The Tambiqui sounds like it could be a great DAC.  I know that you can get DSD as you described, and there are other ways as well.  I choose to do it by the method described above in my two channel system and then I use the SACDs in my multi channel system as well.  I was just reacting to the inaccuracies that another poster related came from someone associated with MM.

  The disc to DAC works well for me but would require either IS2 or HDMI, both of which MM doesn't offer, so let us know how you fare

I have a few hundred SACDs.  My Oppo players output  the DSD layer over HDMI.  My Bryston DAC3 has HDMI inputs.  It sounds amazing and so far Sony hasn't sent a SWAT team to haul me off to a Penitentiary.

HDMI is probably encrypted (HDCP) which could be why you've not attracted law enforcement so far.

I have a RPi with a Pi2aes HAT outputting I2S via Hdmi to the I2S input on my PS audio DSJr.  I'm using the Moode OS  to send Internet Radio and Qobuz sourced music to the DAC, but haven't tried any DSD.  Sounds great, to me, better than usb aes or Spdif.

The Sonore will, it seems will send a converted USB DSD signal directly into a I2s DAC, without DOP being involved.

https://sonore.us/ultraDigital.html

But you need another product, such as a DDC yo convert the usb output to I2S , right?