Sound is randomly switched during keyboard play.

This is mainly the case with fast and strong touch (with sustain).

I tried everything, test program MO8 went well, everything OK (ram, rom, encoder etc.).

Factory reset performed, the error keeps repeating.

Can anyone help me?

I attach the video:

Error video

Welcome to the Forum.

I watched and listened to your video. Thanks for including that. I heard 3 distinct sounds in the video. The sound of the piano, the low thud of the keys, and the unmistakeable clicking of the tactile switches above the sharp keys as you were playing. You’ll notice the screen wigging out at the same time the tact switches are hit. Best to try to avoid hitting them.

Stone

Fantastic observation!

I’ve been wondering about this for a year, you saved me years of finding a mistake. :-)

Thank you very much!