EUROMicroFest 2019

EUROMicroFest 2019 (Artistic Director, Donald Bousted)
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, Wenztinger Haus.
The concerts will feature, among others, guitarist Michael Kudirka (USA), sponsored by the Carl-Schurz-Haus Freiburg; keyboard player, Johannes Keller (Basel, CH) and duo Contour (microtonal trumpets and malletKat).
Speakers will include the composer, Matthias S. Krüger (Lörrach, DE) with guitarist, Stephan Schmidt (Basel); trumpeter, Stephen Altoft (Freiburg, DE); recorder player Kathryn Bennetts (co-author of The Quarter-Tone Recorder Manual) (GB) and, from the Finnish Microtonal Society, composer Juhani Topias Vesikkala.
A full programme will be released nearer the time.
Funded by
Sparkasse Freiburg
Stadt Freiburg
Musik Gillhaus
Venue Partners
Wentzinger Haus, Museum für Stadtgeschichte


International Partners

miCROfest (Zagreb) 

Internationale Gesellschaft für Ekmelische Musik (Salzburg)

‘Mikrotöne: Small is beautiful’ 

ZM4 (Zentrum für Multimedia und Mikrotonalität Musik, Hochschule für Musik und Theater Hamburg)

Finnish Microtonal Society (Helsinki) 

Sydney MicroFest (Australia)

KL-EX Ensemble (Belgium) 

“Polyphonic Performance Spaces” Conference

February 27th, 2019, Brussels conservatory. A Microtonal Day (Lectures, Worshops)

Lectures, workshops and an evening concert with international microtonal experts such as Philipp Gerschlauer (saxophone), Nora-Louise Müller (Bohlen-Pierce clarinet), Anne Davids (flute), Melle Weijters (41-edo guitar), Donald Bousted (composer, quarter-tone guitar), Kathryn Bennetts (recorder), Christian Klinkenberg (composer and pianist), and Juhani Vesikkala (composer). This microtonal day is the first part of a 5 day conference called Polyphonic Performance Spaces. Partners: Vrije Universiteit Brussel, EuroMicroFest

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.