I'm hearing that annoying sound when you use your brakes and you get the chills from the screeching sound.
I have disk brakes and a relatively new bike.
It happens to be front tire shown below. I checked for contaminant and none exists.
You need to sand both the brake disk and the brake pad. The screeching sound is caused because the surfaces are too smooth.
I would recommend swizzstop discbrake silencer, and sand the surface if the brake pads with fine sandpaper.