Hifiberry Digi+ Pro?

Wondering the same…

This is a very noob question but what would turning I2S DAC “On” and selecting the Digi+Pro do. I read up on i2s DACs but, even though I have my Digi+Pro running perfectly fine, I guess I just don’t understand what the Digi+ is doing.

I run a Toslink from my Digi+Pro to my Schiit Modi 2 Uber. What would turning on i2s Dac and selecting Digi+Pro do for me?