crazy wavering sound intermittent on Cascio Privia PX-330

[J. Keefer]

Once in awhile my Cascio PX330 Privia..will begin to sound like a really strange wavering ..makes it impossible to perform or teach from...once sound goes funky

 

https://www.dropbox.com/s/vfnl3sftjonnyv2/20210114_203943 (3).mp4?dl=0

[Brad Saucier]

Try running the pitch bend wheel up and down several times or more.  It needs occasional use to keep everything clean and working smoothly.