Best setting for Rossini DAC and Roon?

My dCS Rossini DAC(and Clock) can upsample to DXD or DSD.
There is no OFF setting so:
I set in the app of the dCS the upsampling to DSD.
What is the UPsample Rate? 64 or 128?
It’s not mentioned in the manual or website.
And because the DAC does upsampling of course I should not use the DSP upsampling of Roon?

We try to be consistent in our nomenclature so DSD always refers to single rate (DSD64) and DSDx2 always refers to double rate (DSD128). So, in this case the upsampling rate is DSD64. Additional choices will be available here in the near future.

I’ve always preferred the Rossini with no upsampling done in the Roon core.

Thank you!

The final “upsampling” level isn’t the final speed the DAC runs at though, is it?

I never tried upsampling in Roon into my Rossini. It seems like a weird thing to do bearing in mind what the Rossini is itself capable of.

No, after all of this processing is done the bitstream is then bumped up to its final level which is considerably faster.

No upsampling in Roon sounds better for me but if you set Roon to upsampling to DSD128 the clicks of the dCS when he is changing sample rate are gone. When you play a playlist with different track this how it must be. Silent between the tracks. You cannot get everything…??