When braking, it whistles unbearably high frequency

Hello, I have installed ATE Performance discs, and also a new set of red ATE Performance brake pads. Before I had the serial pads. Since I wanted to try and improve even a little bit, I bought and installed the red ones, however it squeaks and whistles now after 500km every time the brakes are warm, and always on the last meters before I come to the stand. Had opened the window earlier and that was already very loud. Contact surfaces on the coverings are all thoroughly lubricated with ATE Plastilube, guide bolts also, saddle carriers and shots all cleanly brushed, derusted, etc. All pico. Can it be that these performance coverings just tend to whistle and I can do nothing against it? Antiquitschpaste should therefore probably not change anything anymore… Have now the serial coverings on it again. Optics is boring, but if it is quiet… Otherwise I see no mistake that I can If I try the greenstuff now… will it whistle too? Are also sports coverings. Greetings