Someones probably already done this...

Sauce:
Putin plays piano at Xi Jinping’s residence during forum in Beijing: https://www.youtube.com/watch?v=1huM1Y_XFqY

National Anthem - Russian/USSR [Piano - Klafmann]:
https://www.youtube.com/watch?v=jeVy4V5uxKA

Soviet National Anthem - BASS BOOSTED: https://www.youtube.com/watch?v=KjVLZLsW0do