How to cancel dynamic processing on the minijack output?

Hello, community,
I just found out that sounds, that are coming from the minijack output are very processed. it is either AGC, either some kind of dynamics limiter, or dynamics compressor. I did not put any additional software or devices. and I can’t find the place where I can switch it off. so, if you know, what I can switch off to eliminate this processing, please help me. thank you.

I don’t get the issue but if you want to change the EQ or sound effect, here is a tools: