As part of the international scientific conference ‘Grieg meets Chopin: Warsaw meeting on geometric methods in science’ on the 13^th of July, 2023, the premiere of the ACOUSTIC decaphonic piano, which was created on the initiative of Leszek Możdżer, took place in Nowa Miodowa. During his concert, the music was presented in NEW OUTFIT, in which the line between major and minor is blurred. The world's first instrument of this kind, created by a nine-person team, is now owned by a well-known pianist and composer, and the developed technical solutions have been submitted to the patent office.