Hello...a recent problem for me is that my privia 330 keyboard is out of tune with the other instruments in my band...I discovered that by switching the stretch tuning to off, it corrects the problem, but I have to do this every time I turn the unit on...called Casio, they told me the default setting for stretch tuning is off...I tried a factory reset on the unit, and I still get an on as the default setting...not an end of the world problem, but any thoughts as to why this would occur after many years of use? Thanx