This piece of music by Béla Bartók (1881-1945) is from 1908-09.
Youtube comments ...
szellajos: @Sensenwerk
I totally agree. I don't know how it's even
possible to interpret an old Hungarian folk song
by an outsider. Bela Bartok was talented enough
to encode and Cubus is maybe even more
talented to decode it.
MrKasherine: Amazing!! XD
MrKasherine: Amazing!!

Sensenwerk: Breathtaking. Simple and yet so versatile. I
love some of Bartok's children pieces and your
playing makes it perfect.