The buzz problem everywhere

Steinberg Lounge
1

So, why this is happening in my Yamaha Clavinova 645 and when i am recording acoustic piano?
This happened when converted MIDI to Audio (WAV) inside the Clavinova.

https://drive.google.com/open?id=1GUROkXt5EP5O8dsZwgOoDfmGxLdITJDf