Black Forest Percussion Group: Natur * Gesetz

A Partner event of EUROMicroFest 2019 and in collaboration with L’estro Armonico (two concerts).
1) Elisabeth-Schneider-Stiftung, Freiburg
10.05.2019, 8pm

2) Erzingen Kath. Pfarrkirche St. Georg, Stuhlingen
12.05.2019, 5pm

L’estro Armonico

Monika Ecker, Cello
Nadja Camichel, Flute
Yelizaveta Kozlova, Violin
Adhi Jacinth Tanumihardja, Harpsichord

Black Forest Percussion Group

Lee Ferguson
Christian Rombach
Dino Georgeton
Bertrand Gourdy

The concert carries the title of “Natur*Gesetz” and is based around two works, J.S. Bach’s “Musical Offering” and David Lang’s “The So-Called Laws of Nature”.  The listener will be experiencing two different types of microtonality in these concerts. L’estro Armonico will be playing in Valotti a’=415Hz while Black Forest will be playing hand-made instruments which have been tuned to a tempered scale; although the nature of the instruments and inconsistency of materials (Ceramic flower pots, wooden boards, metal pipes,) naturally create a microtonal quality and unusual sound spectrums. 

Stadt Freiburg Kulturamt 

Regierunspräsidium Freiburg
Erzingen: Katholische Pfarrkirche St. Georg

EUROMicroFest 2019

EUROMicroFest 2019 (Artistic Director, Donald Bousted)
4th international festival of microtonal music and interdisciplinary art presents:
Das Stimmt!!
Alte und Neue Musik
In Tune!
Early and New Music
EUROMicroFest is a collaboration between Microtonal Projects and un-sound e.V. in Freiburg, Germany.
Dates: 24th-25th May, 2019, at the Elisabeth-Schneider-Stiftung and Museum für Stadtgeschichte, Wentzinger Haus.


The concerts will feature guitarist Michael Kudirka (USA), sponsored by the Carl-Schurz-Haus Freiburg; keyboard player, David Henkelman (Freiburg/ Canada); duo Contour (microtonal trumpets and malletKat) and ensemble l’imaginaire (Strasbourg)


Speakers: Matthias S. Krüger (Lörrach, DE) with guitarist, Stephan Schmidt (Basel); Composer, Christian Klinkenberg (BE); recorder player Kathryn Bennetts (co-author of The Quarter-Tone Recorder Manual) (GB) and, from the Finnish Microtonal Society, composer Juhani Topias Vesikkala.

Pong,Pong,Pong – microtonal videogame for up to 6 players
Students from the Hochschule Macromedia with Prof. Ephraim Wegner


A full programme will be released soon!


Funded by

Strandkorbstiftung/ Freiburger Bürgerstiftung
Sparkasse Freiburg- Nördlicher Breisgau 
Stadt Freiburg im Breisgau Kulturamt
Stiftungen Landesbank Baden-Württemberg
Regierungspräsidium Freiburg


Musik Gillhaus


Venue Partners
Museum für Stadtgeschichte, Wentzinger Haus


EMF Freiburg Partner Ensembles:


International Partners
Internationale Gesellschaft für Ekmelische Musik (Salzburg)
‘Mikrotöne: Small is beautiful’ 
ZM4 (Zentrum für Multimedia und Mikrotonalität Musik, Hochschule für Musik und Theater Hamburg)
KL-EX Ensemble (Belgium) 
“Polyphonic Performance Spaces” Conference
Sound Plasma Tallin and Berlin

RASP on Bandcamp

We have been aware that buying RASP (Stephen Altoft’s 2nd CD of 19-div music) through Tutti is expensive, because of postage and packing charges, if you live at various points around the world.  We have therefore added it to Bandcamp.  We hope you will still buy it!  Although you get 3 listens for free!

Also, we have added Steve’s first solo 19-div CD The Yasser Collection to our Dropbox Resources.  This is now available FREE if you have signed up to The Microtonal Trumpet mailing list via the contact page.


“Seven Leaves” – An interactive musical narrative by Christian Klinkenberg


Christian Klinkenberg’s new Bohlen-Pierce composition ‘Seven Leaves’ was first performed on the 27th of April in the cultural center “Alter Schlachthof” Eupen (Belgium) with the Kl-Ex Ensemble. There will be a further performance on November 20th, 2018 in the “AINSI” Theater Maastricht (NL).

The musicians

  • Nora-Louise Müller: Bohlen-Pierce Clarinet
  • Todd Harrop: Bohlen-Pierce ChimesÂ
  • Franck Hemmerle: Percussion
  • Vedran Mutic: Bohlen-Pierce-E-BassÂ
  • Melle Weijters: Bohlen-Pierce-E-Guitar
  • Christian Klinkenberg: Bohlen-Pierce Keyboard
  • Paul Pankert: ViolinÂ
  • Suse Weisse: Storyteller
  • Lothar Felten: Interactive App
  • Jens Schumacher: Samples and real-time-fx
  • Marc Kirschvink: Paintings



A story about lost love, an evil witch, an enchanted tree, and the leaves that hung, but never grew is integrated in the performance.

The scale

The Bohlen Pierce scale is a 13-step non octave scale which is tempered to the perfect-twelfth (3/1). For this reason, the musicians have specially constructed instruments (clarinet, keyboard, chimes). The string instruments (e-guitar, bass, violin) also need to retune their strings and have to increase the spacing of the fingerings or frets by about half.

The app

The special feature of this performance: the audience can play along via an app.


EUROMicroFest, Chudoscnik Sunergia, IMPACT (International Meeting in Performing Arts and Creative Technologies), Jazz Maastricht

Photos by Peter Ortmann


RASP new CD released soon!

In a few weeks time Stephen Altoft is releasing his new CD, RASP.  To whet your appetites the full CD notes can be downloaded here: RASP CD Programme Notes.  Stephen is presenting 11 recently written pieces in 19-division tuning.  Like the Yasser Collection before it, these pieces are diverse in orientation and international in outlook.  The CD, presented as a Digipack, will be available through Tutti.