Hifiberry DAC+ options

Hi, I recently started with Volumio with great satisfaction.
I’m using Raspi3 with Hifiberry DAC + and in the playback section of the version 2.175 I saw many options for that DAC.
There is described somewhere how to set the different parameters and how do they can affect the output sound ?

I, too, have one of these and I went looking. This (support.hifiberry.com/hc/en-us/ … P-Programs) is the best I could find. TL;DR they do nothing of any normal use…

Chris M

Thank you for the your reply… That is also what the Hifiberry replies, but it is very strange, however.