I2S out from Up2stream Pro v4

Hi,
I would like to connect an external DAC to the I2S out from the up2stream v4.
What I understood was that the effects used in the DSP through the ACP bench does not work.
The DSP function only works with the Analog DAC out.

Wanted to check is the Information right?

Thanks

I temporary moved WiiM Pro room correction to Up2Stream room and generated both channels EQs then manually input 20 points EQ perimeters to ACP bench and flashed to memory. The old Up2Stream sound quality has improved lot.