I love my PX-560 but a few days into owning it, I have noticed a slight "flutter" or warble when playing mid range keys using the "home base" Grand Piano sound. It happens only when playing through the onboard speakers. The problem isn't there if I listen through headphones which leads me to believe it's some kind of harmonic resonance type of problem with the speaker/case design. FYI, the keyboard is near but no flush against a wall. Surely though, that's an expected positioning for this kind of keyboard.
FYI, the keyboard is mounted on the CS-67 stand by Casio that is purpose built for this unit.
It's not the modulation wheel because that is firmly set to the zero position. Speaking of which, I find the mod wheel is a tad sticky at the zero end. Is that normal?
I've attached a sample sound.
Am I the only one experiencing this? Should I just return it to the store and get a replacement or will the new one be exactly the same?
Keyboard Flutter.m4a