Time Dreaming Album Now OUT!

Time Dreaming is available on most digital platforms (Spotify, Apple Music, Amazon Music etc)

This third album featuring the 19-division (of the Octave) trumpet deals very thoroughly with harmony: in the form of electronics, multi-tracked trumpets, duo with a malletKAT, and ultimately with very precisely defined 19-division three-part harmony in the title work, Time Dreaming by Donald Bousted. As 19-division tuning is a modern version of the historical third-comma meantime temperament from the early baroque, there exists a constant link to the distant past, at the same time as a glimpse towards future harmonic possibilities still to be explored.

Four of the works were premiered as part of a US Tour in 2014, playing at American Festival of Microtonal Music and Boston Microtonal Society events. Others were first played in 2019 at EUROMicroFest, TechFest Aberdeen and Festival Mikrotöne Basel. This album also sees the premiere recording of the 19-division Flugelhorn, with ‘Sarabande?’ by Eleni Ralli, the first piece written for my ‘Inspired by Baroque’ project.


1. Time Dreaming (2018) Donald Bousted (UK) for 3 19-div trumpets 6:32

2. Upward in time (2013-2014) Elia Koussa (LBN) 8:35

3. noiwont (2014-2021) Georg Hajdu (DE) with playback 5:04

4. Cerulean (2018) Carlos Cotallo Solares (ES) 3:05

5. Hidden Jewels (2018) Stephen Altoft (UK/ DE) for 7 multi-tracked 19-div trumpets 9:01

6. Gathering Meaning (2014) Julia Werntz (US) 6:13

7. Interlude (2019)  Vasiliki Kourti-Papamoustou (GR) with malletKAT, Lee Ferguson 4:43

8. Sarabande? (2020) Eleni Ralli (GR) for 19-div Flugelhorn 4:12

9. Studie 2: Lines (2017) Manfred Stahnke (DE) with 3 pre-recorded 19-div trumpets 1:13 From ‘Vier Studien für 19ton-Trompete’

10. Studie 3: Dance (2020) Manfred Stahnke (DE) with 3 pre-recorded 19-div trumpets 0:37 From ‘Vier Studien für 19ton-Trompete’

11. Studie 4: Complex Flow (2019) Manfred Stahnke (DE) with 1 pre-recorded 19-div trumpet 5:12

12. Yiiiha (2014) Gordon Kampe (DE) 3:49

The scores for all tracks are now in the Microtonal Trumpet Website Resources Folder on Dropbox

Pascale Criton/Stephen Altoft

Microtonal Projects have long been associated with the french composer, Pascale Criton. She was a featured composer twice at UKMicroFest, where she was a Keynote Speaker, and has also appeared with the ‘cellist, Deborah Walker at EUROMicroFest 2017.

We are delighted to announce that Pascale is now contributing to the Microtonal Trumpet project. She and Stephen Altoft have been awarded a Virtual Partner Residency by the Goethe Institut, and are meeting online to research a work for quarter-tone trumpet and pre-recorded electronics. 

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.