This piece of music by Béla Bartók (1881-1945) is one of 153 progressive piano pieces in six volumes written between 1926 and 1939.
Youtube comments ...
cubusdk: In this case it is a software piano with a
sound library of 19 GB. I mention the source of
the sound in the video descriptions as it can
change from video to video.
Pianopod: I love the tone of your piano. Beautifully
played as ever.
Musical Pieces 
