Tetraktys

Tetraktys is a Greek word meaning ‘quaternary’. It is a term that had an important meaning in Pythagorean philosophy. The Tetraktys was considered a sacred symbol and represented the essence of the cosmos and the order of the universe. The Tetraktys represents the idea of harmony and proportion. It is a piece played on a felt piano, slow and with a very deep melody suitable for creating a very relaxing and concentrated atmosphere.

https://open.spotify.com/track/7ykl9h5A71j6AErzEUxDNH?si=d4626fdbef94477d