hi everyone, recently i changed audio interface, i have a MOTU 828x, i tried to make measurements with rew but the result is not linear, it seems that there is a filter that blurs the high frequencies, obviously i don't use equalizers or filters that cut frequencies, with my old audio interface this did not happen, even if using the same preamp and microphone, (I also tried to change the microphone but I did not solve the problem). Could it be the audio interface's fault? if it was the fault of the audio interface, does this mean that it is defective?
I exclude that it is the fault of the room, with the old audio interface there was no problem, I also tried to take measurements in another room, but the problem persists