https://youtu.be/ASJo4COwRWU?si=wiQV6_eroNwmis_J
https://subrosalabel.bandcamp.com/album/pieces-for-sixth-tone-harmonium

Pieces For Sixth​-​Tone Harmonium
by Hába, K.Lang, Niblock, Berkson, B. Lang, Mofakham, Guštar, Mikyska performed by Miroslav Beinhauer.

Until recently, the sixth-note harmonium was just one of the many exhibits in the Czech Museum of Music. After almost a century, however, it is enjoying a renaissance and attracting the interest of the professional public, musicians and composers.
The first model of the sixth-tone harmonium was created in the 1920s on the basis of a commission from the pioneer of microtonal music, Alois Hába, whose visions for its construction convinced the company August Förster. The improved model of the harmonium dates from 1936 by the same company. The first Czechoslovak president Masaryk supported the purchase of the new instrument by contributing ten thousand crowns, and the same amount was added by the Ministry of Education and National Enlightenment at the time. The only example of a working sixth-tone harmonium in the world belongs to the collections of the National Museum and is permanently exhibited in the Czech Museum of Music in Prague.
Pianist Miroslav Beinhauer (*1993) is recently the only musician in the world who can play this unique instrument. In 2018, he participated in the premiere of Hába's sixth-tone opera Come Thy Kingdom, followed by the staging and recording of Alois Hába's opus Sixth compositions for sixth-tone harmonium, op. 37, which was the only solo composition for this instrument for more than ninety years. In the last three years, new repertoire for sixth-tone harmonium has been written by renowned Czech and foreign composers.
New compositions were written by Phill Niblock, Klaus Lang, Bernhard Lang, Milan Guštar, Judith Berkson, Idin Samimi Mofakham and Ian Mikyska. The premiere of these compositions took place in August 2023 as part of the Ostrava Days contemporary music festival.

Miroslav Beinhauer - Sixth-Tone Harmonium.
recorded at Sound Studio HAMU, Academy of Performing Arts, Prague, 5 & 6 September 2023.
Published with the support of the Ministry of Culture of the Czech Republic and the Czech.......
more