MicroFest Prague 2020

On 17th October Microtonal Projects (Stephen Altoft and Donald Bousted) took part in the online MicroFest Prague 2020. We presented a video on the subject of 19-division Harmony, focussing on the Microtonal Trumpet project and took part in an online forum. Our intention was to encourage composers who had not written in 19 before by demonstrating the broad range of approaches possible and by defining the essential harmonic elements of 19-div compared to 12-div.

All video presentations are available to watch at


Sometime in 2010, and I regret to say I’m not sure when, Kirsten Edwards and I were asked to present a programme for Resonance FM as a means of advertising our forthcoming UK MicroFest 4 at The Vortex Jazz Club, London.

These are the notes for the show. There was some improvisation and some editing too and I have to confess that I never heard the final version (there was a very stressful lead-in to that event!). But I know it did help bring a few people along for the performances and presentations (the full programme of the event, which was jointly hosted by the Royal Academy of Music, can be accessed by subscribing to our Dropbox Resources folder).

It’s not a perfect document, it’s more of a prompt for the show, but reading it back 10 years later, it does give a sense of what Microtonal Projects was about then, and many aspects have carried through to the EUROMicroFest series.

Microtonal Projects at Art’s Birthday, Freiburg

Art’s Birthday, 17th January 2020, E-Werk, Freiburg, Germany.

SWR2 broadcast

Microtonal Projects (Stephen Altoft, trumpet and flugel horn; Donald Bousted, electronics) present works by Stephen Altoft and Donald Bousted for 19-div trumpet and microtonal flugelhorn (48-div, just intonation) with electronics.

This is the first performance of Stephen’s microtonal flugelhorn, which arose out of a talk Stephen gave as part of EUROMicroFest 2017. This year Stephen has been working with Siegmar Fischer of Musik Gillhaus on the conversion: the quarter-tone valve and the 1/19-div valve (both with in-built slides) are exchangeable. As with the microtonal trumpet conversion kits, the 19-div set-up requires exchanging slides and also employs ‘remember rings’ to hold slides at the required lengths.

48-div/19-div flugel horn, 2019

Marc Sabat – keynote presentation

Marc 2015


In this keynote, Marc Sabat, will share his artistic practice and how it is shaped by listening to qualities of tuneable Just intervals.

Marc is a Canadian composer of Ukrainian descent who has been based in Berlin since 1999. He makes pieces for concert and installation settings, drawing inspiration from investigations of the sounding and perception of Just Intonation and of various music forms — folk, experimental and classical. He is a frequent collaborator, seeking fruitful interactions with other musicians and artists of visual and literary modes to find points of shared exploration and dialogue between various forms of experience and different cultural traditions. Sabat studied composition, violin and mathematics at the University of Toronto, at the Juilliard School in New York, and at McGill University, as well as working privately with Malcolm Goldstein, James Tenney and Walter Zimmermann. Together with Wolfgang von Schweinitz he has developed the Extended Helmholtz-Ellis JI Pitch Notation and is a pioneer of music written and performed in microtonal Just Intonation. He teaches composition and the theory and practice of intonation at the Universität der Künste Berlin. Creative commons scores and artist editions are available from Plainsound Music Edition.


EuroMicroFest 2019 – Microtonal Talks


Elisabeth-Schneider-Stiftung, Saturday 25, May, 2019, 2pm – 4.30pm 

As is usual at EUROMicroFest, we ask a small number of distinguished guests to present an insight into their work.

2.00pm || Historical Tunings and Temperaments on Guitar: An Introduction to their Realisation with Modern Microtonal Fretboards with Michael Kudirka (USA). 

2.30pm || Composer Matthias S. Krüger presnts his piece ‘Arkadische Botschaften I’ – after Peter Kees – for microtonal guitar with prepared steel strings in scordatura. We are delighted that the distinguished guitarist Stephan Schmidt will be present to play the complete work.

3.00pm || Christian Klinkenberg (BE), Engaging the audience: Microtonality and Interactivity in a Concert Situation.  Composer/performer Christian Klinkenberg will demonstrate an app which introduces interactivity into the concert situation.

3:30pm || Characteristics of the microtonal scene in Finland with composer Juhani Vesikkala

4.00pm || Crafting the Pitch: microtones on the recorder and The Quarter-Tone Recorder Manual with Kathryn Bennetts (GB), Recorder.  Kathryn will introduce the pedagogical method behind the Quarter-Tone Recorder Manual and demonstrate the progression through two works by Donald Bousted.

David Henkelman at EUROMicroFest 2019

David Henkelman (CA) will give a keyboard recital on Saturday 25. May, 2019 at Museum für Stadtgeschichte, Wentzinger Haus, 11am- 12pm

He will play music from the 17th and early 18th Centuries in historical tunings – at least two different tunings will be used

Works by Johann Christoph Bach (1642-1703), Michelangelo Rossi (1601/1602-1656), Girolamo Frescobaldi (1583-1643), Johann Jacob Froberger (1616-1667), Johann Sebastian Bach (1685-1750)

Henkelman David - Photo David Henkelman was born in Vancouver, Canada. In 2012 he received a Bachelor’s degree in Anthropology and Spanish, and then in 2015 he received a Bachelor’s of Music degree in harpsichord and historical performance from McGill University in Montreal. In 2016 David began his studies at the Hochschule für Musik, Freiburg, studying harpsichord and fortepiano with Prof. Dr. Robert Hill and basso continuo with Prof. Michael Behringer. He finished his studies in 2019. As a harpsichordist and a continuo player, David has participated in several concerts and projects under such renowned directors as Jeanne Lamon (Tafelmusik), Raphaël Pidoux, Adrian Butterfield, and Ton Koopman, Since 2018 he has been a scholarship recipient from the Williamson Foundation of Music.

Michael Kudirka (guitar) opens EUROMicroFest 2019 on Friday, May 24th, 20:00.

Michael Kudirka – guitar

EUROMicroFest 2019. Friday, May 24th, 20:00.

Elisabeth Schneider Stiftung. Freiburg im Breisgau​, Germany.



  • 1⁄4-comma Meantone Tuning

Francesco Canova da Milano (1497-1543)

Fantasias from the libro terzo (pub. posth. 1562) Fantasia 2 (N 31) Fantasia 10 (N 13) Fantasia 6 (N 35) Fantasia 5 (N 33) Fantasia 11 (N 38)

John Dowland (1563-1626)

Four Lute Pieces Lachrimae (P 15)

Forlorn Hope Fancy (P 2)
Semper Dowland Semper Dolens (P 9) Mr. John Langton’s Pavan (P 14)

  • 1⁄5-syntonic comma Continuo (Werckmeister 1698)

 Johann Sebastian Bach (1685-1750)

Lute Suite in E minor, BWV 996

Praeludio, Allemande, Courante  Sarabande,  Bourrée, Giga

  • 12-TET with 1⁄3-tones and 1⁄4-tones

Jeffrey Holmes (b. 1971)

Draumr [Dreams] (2013)
I. Svarti Sæ [Black Sea] II. Blakkr Straumr [Dark Current] III. Svalbarð [The Cold Edge]

  • Temperament Ordinaire (Jean-Philippe Rameau, 1726)

Bryan Johanson (b. 1955)

I. Two Gizmos (2018) I Presto, ma realistico; II. Allegro vivo

  • 11-Limit Just Intonation (Lou Harrison and William Slye, 2001)

Dusan Bogdanovic (b. 1955)

Village Music (2004)  I. quasi improvvisando; II. Moderato ritmico


Michael Kudirka is a classical guitarist with many interests including collaborations with living composers, chamber music with guitar, and historical performance practice on lute and theorbo. Performing internationally throughout Europe, Asia, and North America he has appeared in many notable concert series, including Other Minds 8, the 43rd Darmstadt Ferienkurse für Neue Musik, Montreal’s “Musique Contemporaine”, Portland Guitar Festival, Guitar Foundation of America 2011 International Convention, Jacaranda “Music at the Edge”, and the L.A. Philharmonic’s “Minimalist Jukebox”, among many others. He has won first prize at several major guitar competitions including the 2000 Portland International Guitar Competition, the American String Teachers Association Competition, the Pacific Guitar Competition, and the University of Southern California Concerto Competition. He has won grants from the Theodor Presser Foundation, the California Arts Council, and the American Composer’s Forum and has held faculty positions at the University of North Carolina School of the Arts, Interlochen Arts Academy, University of Southern California, and Idyllwild Arts Academy.

Michael Kudirka is sponsored by D’Addario and Augustine strings.


with grateful support from Carl-Schurz-Haus: