Turns out firmware didn't directly affect the sound. Apparently after I flashed it with tempotec firmware, P20 pro recognized it as a new device and turned Dolby Atmos on. Dolby Atmos "smart" mode has really weird effect on music. So no, that firmware does not mess with the sound, but it does...

Don't do that, it messes with the sound

It says "Hidizs" on mine, I tested my luck with Tempotec's firmware. I tired that "Hidizs" with Tempotec firmware on Galaxy S8 - everything works perfectly fine, sample rates up to 192k. Huawei seems to be the problem.

Hi all, I bought this device yesterday for my Huawei P20 Pro, was surprised to experience weird behavior this DAC exhibits on Huawei devices. After few re-flashes I figured "D" mode isn't gonna work with P20, so I tried a firmware from this page...