(Reverse chrono.)


end of October 2020 – conference and festival of the Bohlen–Pierce system, plus other microtonal events, including my doctoral graduation recital. Hochschule für Musik und Theater Hamburg.

18 May 2020 – playing drums with Seaside Jam big band cancelled due to slight pandemic.

1 May 2020 – international release date by GENUIN Records of CD of new chamber music in Bohlen–Pierce tuning, incl. two works by me: Maelstrom and Bird of Janus.


Summer semester 2020 – teaching seminar on microtonality, for the Hochschule für Musik und Theater Hamburg, online until further notice.


5 March 2020 – jazz jam at Funambules, Luebeck.
13 Feb. 2020 – blues session at Funambules, Luebeck.

26 Jan. 2020 – jury member for new music component of 57. Regionalwettbewerb Jugend musiziert, Lübeck.

9 Jan. 2020 – blues session at Funambules, Luebeck.

Winter semester 2019/20 – seminar in microtonality at Hochschule für Musik und Theater Hamburg: Seventh-tones! From 1/5th-comma meantone to 41 EDO, from Verheijen to Partch and today’s composers.

Summer semester 2019 – seminar on Bohlen–Pierce tuning system at the Hochschule für Musik und Theater Hamburg.

12 Dec. 2019 – final graduation recital of doctoral candidate Nora-Louise Müller, with guest Ákos Hoffmann, BP clarinets. She will perform two of my compositions: Der Zauberzephir and Bird of Janus. Hochschule für Musik und Theater Hamburg, Multifunktions Studio, 7 PM.

5 Dec. 2019 – jazz jam at Funambules, Luebeck.
14 Nov. 2019 – blues session at Funambules, Luebeck.
12 Sep. 2019 – blues session at Funambules, Luebeck.
13 June 2019 – blues session at Funambules, Luebeck.
16 May 2019 – jazz jam at Funambules, Luebeck.

3–4 May 2019 – presentation and workshop of the Bohlen–Pierce Project Hamburg at Mikrotöne Basel, Switzerland.

11 April 2019 – blues session at Funambules, Luebeck.

Winter 2018/19 – taught a seminar on microtonality at the Hochschule für Musik und Theater Hamburg.

14 March 2019 – blues session at Funambules, Luebeck.
7 March 2019 – jazz jam at Funambules, Luebeck.
21 Feb. 2019 – jazz jam at Funambules, Luebeck.
14 Feb. 2019 – blues session at Funambules, Luebeck.
17 Jan. 2019 – jazz jam at Funambules, Luebeck.
10 Jan. 2019 – blues session at Funambules, Luebeck.
20 Dec. 2018 – jazz jam at Funambules, Luebeck.
13 Dec. 2018 – blues session at Funambules, Luebeck.
6 Dec. 2018 – jazz jam at Funambules, Luebeck.

Nov. 20, 2018 – percussionist in remount of Klinkenberg’s multimedia show (in the BP scale), Die sieben Blätter. Maastricht, The Netherlands; plus CD recording.

Oct. 17–19, 2018 – panel discussion on microtonal pedagogy, yesterday and today. MikroFest, Helsinki.

Oct. 4, 2018 – jazz jam at Funambules, Luebeck.
Sep. 13, 2018 – blues jam at Funambules, Luebeck.
Sep. 6, 2018 – jazz jam at Funambules, Luebeck.

Aug. 12, 2018 – playing drums for Seaside Jam big band, Malente Germany.

June 2, 2018 – playing drums for Daily Blues band, Luebeck.

April 27, 2018 – playing percussion in premiere of Christian Klinkenberg‘s multi-media work, Die sieben Blätter (The Seven Leaves), in Bohlen–Pierce tuning. Synergie festival d’art, Alter Schlachthof, Eupen, Belgium.

Winter 2018 – jury member for artistic category (composition, sound art etc.) of klingt gut! symposium 2018, Hamburg.

March 1, 2018 – jazz jam at Funambules, Luebeck, from 9 pm.
Jan. 18, 2018 – jazz jam at Funambules, Luebeck, from 9 pm.
Jan. 4, 2018 – jazz jam at Funambules, Luebeck, from 9 pm.

Nov. 17, 2017 – Book release! Celebrating composer and teacher Manfred Stahnke with Just in Tone and Time, edited by Benjamin Helmer and Georg Hajdu. Neumünster: von Bockel Verlag (ISBN 978-3-95675-020-5). My chapter, “On Mixing Scales: three compositions with 19 and 13 equal steps per twelfth,” pp. 139–176.

Oct. 19, 2017 – jazz jam at Funambules, Luebeck, from 9 pm.
Oct. 5, 2017 – jazz jam at Funambules, Luebeck, from 9 pm.
Sep. 20, 2017 – jazz jam at Funambules, Luebeck, from 9 pm.

July 1, 2017 – presenting at Mikrotöne ~ Microtones: small is beautiful symposium re. alternative flattened dimensions in harmonic space. Ekmelische Musik, Salzburg.

June 3, 2017 – live sampling and electronic intervention with “Störungen: Geist” theme (disturbances: ghost/mind) for Petrivisionen, St. Peter’s church, Luebeck.

May 15, 2017 – performance of Man in blue suit thanks firefighters, Stephen Altoft (tp.) and Ephraim Wegner (electr.), EURO MicroFest 2017, E-Werk Kammertheater, Freiburg.

March 17–19, 2017 – jury member for ‘Chiffren prize’, Jugend Musiziert, Luebeck.

Sep. 12–16, 2016 – presented a paper at the International Computer Music Conference, Utrecht: “Composing in Bohlen–Pierce and Carlos Alpha Scales for Solo Clarinet”.

Aug. 31–Sep. 3, 2016 – presented another paper at the Sound & Music Computing conference, Hamburg: “Modulating or ‘Transferring’ Between Non-octave Microtonal Scales”.

June 15–23, 2016 – sound design and composition for Theater der Infamen Menschen, a theatre-with-music project on the subject of Tourette’s syndrome. Directed by Hans-Jörg Kapp. (Concurrent with the International Parkinson and Movement Disorders Congress.) Theater Combinale, Lübeck and Ballhaus Ost, Berlin.

June 18, 2016 – premiere of Man in blue suit thanks firefighters, for 19-tone trumpet and 8-channel audio. Stephen Altoft, trumpet, and Ephraim Wegner, electro. NINETEEN, Blurred Edges festival, Hamburg.

May 26–28, 2016 – attending klingt gut! symposium on sound, Hamburg University of Applied Sciences. Mini-talk and premiere of Apollo, for percussion and computer, me performing.

May 20–21, 2016 – playing percussion with David Cariano Timme and members of Theater Combinale in Bilderfluss, a promenade events evening along the rivers of Luebeck. There will be sparks!

April 7–8, 2016 – attending ArtSearch symposium for artistic research in music, Hochschule für Musik und Theater Hamburg. Premiere of Ricercar für H.B. in BP ‘1/2-tone’ scale, i.e. 26 equal steps per perfect twelfth (close to, but not quite, a 3/8ths-tone scale). Fixed media diffused on our 340-channel wavefield synthesizer.

Feb. 17, 2016 – performance of Bird of Janus for clarinet in BP and alpha tunings. American Festival of Microtonal Music, Berlin.

Feb. 16, 2016 – performance of Normally Natural by Motion Ensemble. Sanctuary Theatre, Saint John, New Brunswick.

January 30, 2016 – premiere of Strega, miniature for clarinet, cello and piano, by members of Ensemble Paramirabo. Jan. 29–30, Wilfrid Laurier University 40th Anniversary Festival, Waterloo Canada. 1 PM.

Nov 4, 2015 – spoke with colleagues about our research at the Music, Multimedia and Microtonality department of the Hochschule für Musik und Theater Hamburg, as part of a 2015/16 Music and Engineering Event Ring with NDR, local universities, Steinway and Sennheiser. Entrance is free—you should come! Till Feb. 9, 2016

May 14, 2015 – premiere of Hohler Fels for flute and demi-clarinette, played by In Extensio, Montreal.

Feb. 15, 2015 – co-organized a concert (in Bohlen–Pierce tuning) as part of the 10th anniversary of the Multimedia Programme at the Hochschule für Musik und Theater Hamburg. New works premiered (and Maelstrom revised) played on three BP clarinets and a 41-tone guitar with special guest Melle Weijters! Nora-Louise Müller, Ákos Hoffmann and Carola Schaal, clarinets, with musicians and faculty of the HfMT.

Feb. 15, 2015 – New book on microtonal music theory, 1001 Microtones. I contributed a chapter called “Bohlen–Pierce Just Chromatic Scales and Beyond”, and my co-conspirators include Georg Hajdu, Nora-Louise Müller, Konstantina Orlandatou, John Schneider, Julia Werntz, Khosrow Djafar-Zadeh, Sascha Lino Lemke and Matti Pakkanen. Edited by Manfred Stahnke and Sarvenaz Safari, published by Bockel Verlag.

Dec. 5, 2014 – operating ring modulators for my friends in their Radar Ensemble concert, featuring works by Vinko Globokar and Québecois composers Denis Gougeon and Claude Vivier. “Pioniere des Klangs” in Klangrauschen series, at the Essig Fabrik, Lübeck. Details here.

Nov. 4–15, 2014 – sound design and live sampling for Theater der Infamen Menschen, a theatre and music collaboration between science and art organizations on the subject of Tourette’s syndrome, directed by Hans-Jörg Kapp. Theater Combinale, Lübeck. Details here.

late-October, 2014 – attending Donaueschingen Music Days conference/festival.

Sep. 29, 2014 – three-day orientation session at STEIM, Amsterdam. Introduction to their studio/laboratory/network and orientation for artist residencies.

Aug. 29, 2014 – premiere of new work, Stonepath Night, for tenor saxophone and bass trombone, performed by Alfredo Mendoza and Felix del Tredici, also with premieres by Andrea Young, Mirko Sablich and André Cormier. Espace Vide, Série musique expérimentale @ Le milieu: 1251 rue Robin, Montréal (près de métro Beaudry). $6 suggérée.

June 14, 2014 – video installation with Michael Knarr, as project in seminar by Alex Schubert. Co-current with audio installation by class of Sascha Lino Lemke. Composers’ Evening, Musik Hochschule Luebeck.

May 23 & 24, 2014 – playing with Nora-Louise Müller as part of Radar Ensemble, in a ‘river promenade’ cultural event organized by Theater Combinale. Hanseatic Festival, Luebeck.

May 17, 2014 – 60×60 2012–2013 UnTwelve Mix @ Mobius, Cambridge MA.

May 3, 2014 – Sankt Petri Visionen. I’m playing short improvisations on frame drum, Tibetan bowls, tam-tams and gongs, with and between poetry readings. Sankt Petri Kirche, Lübeck, Germany. 11:00 PM.

March 8–April 5, 2014 – playing drums on tour with indie-pop band Plumes. Twenty shows, from Aachen to Winterthur. Please check schedule for cities & dates!

March 5–7, 2014 – presenting my Bohlen–Pierce music and research in conference, Composition In The 21st Century. Trinity College, Dublin.

Feb. 25–March 2, 2014 – recording new album with Montreal indie-pop band, Plumes. (The studio is in a castle!)

Feb. 24, 2014 – Die Elbe kommt, Hochschule für Musik und Theater Hamburg, 7 PM.

Nov. 16, 2013 – release of microtonal album Possible Worlds Vol. 2 on spectropol records. My work for 1/5th-tone piano, Fifteen Short Pieces, is included.

Nov. 2, 2013 – Petri Visionen, Krisen, Improvisations with Nora-Louise Müller (clarinet) and Todd Harrop (percussion). 23 Uhr, St. Petri zu Lübeck.

Oct. 11, 2013 – premiere of Die Elbe kommt, for 2-channel fixed audio featuring sounds cooked up on a vintage EMS analog synthesizer. Lüneburg, Germany.

mid-August, 2013 – composer-performer intensive in Bayreuth, Germany. Developing new work for percussion and multimedia. Festival junger Künstler Bayreuth

July 11, 2013 – work-in-progress for frame drum, audio and live video. Hochschule für Musik und Theater Hamburg (HfMT).

July 8, 2013 – performance of Bird of Janus, for clarinet in Bohlen-Pierce and Carlos alpha tunings, HfMT.

Spring 2013 – new work included in 60×60 UnTwelve compilation of short, microtonal pieces. (For piano and delay FX, using a 15-note scale out of 30 equal divisions of the octave.)

May 17, 2013 – Music for two BP clarinets, percussion and electronics. Roxy auto-config with special guest, Carola Schaal, at the Blurred Edges festival (May 3–18). Concert: May 17, Jupihaus, Gängeviertel, Hamburg.

April 17–27, 2013 – playing drums with Plumes on their GERMANY TOUR: Berlin (3x), Erfurt, Hamburg, Kiel, Mainz, and Münster!

Apr. 8, 2013 – performed in premiere of André Cormier’s En paranthèses at Klang im Turm, Munich.

Feb. 3, 2013 – presenting my music & research in Bohlen–Pierce tuning at EUROMicroFest 2013. Kunsthochschule für Medien, Cologne.

Jan. 16, 2013 – Included in the 60×60 +Dance +Theatre 2013 show at the D.B. Clarke Theatre, Montreal. The concept looked fascinating but, unfortunately, I couldn’t attend. My piece, Lithu.f.o, is on the 60×60 (2012/Canada Mix) compilation.

Oct. 19, 2012 – performance of Bird of Janus in recital by Müller, and improvisations by Roxy autoconfig. Vergil Reality, Montreal.

Oct. 9, 2012 – premiere of Bird of Janus for solo clarinet in Bohlen–Pierce and Carlos alpha tunings. Recital of Nora-Louise Müller, Gallery 345, Toronto.

Oct. 4, 2012 – Vernissage featuring artists of the Leighton Colony, Banff Centre. Photos and videos by Mina Bárcenas, Daniela Edburg, Ilián González, and audio by Todd Harrop. Philosophers’ Knoll, cinq à sept.

August–October 2012 – artist residency at The Banff Centre for the Arts, with support of the Conseil des arts et des lettres du Québec and the Canada Council for the Arts, composing new works in alternative tunings.

August 15, 2012 – Roxy autoconfig playing at Tonfink, Lübeck Germany. Works for clarinet, percussion and electronics in alternate tunings. PWYC

August 10, 2012 – solo show at KIBLA: Festival (DA)(NE)S. Original works, composed and improvised, for percussion-theatre featuring microtonalities, microrhythms and macro-awesomeness. Maribor, Slovenia (2012 European Capital of Culture)

July–August 2012 – Eutiner Festspiele, playing timpani in Der Freischütz für Kinder, adaptation of the opera by Carl Maria von Weber.

May 19, 20212 – Roxy auto-config playing music in Bohlen-Pierce and Carlos Alpha tuning at Blurred Edges festival, Gängeviertel, Hamburg Germany.

March 2012 – artist residency at the matralab; research at Concordia University in percussion-theatre.

Dec. 1–3, 2011 – reading in Charles Dickens Writes A Christmas Carol by Richard Quesnel. Lost & Found Theatre at The Registry, 122 Frederick St., Kitchener ON. Books for Kids Fundraiser

Oct. 27–Nov. 5, 2011 — sound design for Pearl Gidley by Gary Kirkham, directed by Alan Sapp. Lost & Found Theatre at The Registry, Kitchener ON.

Oct. 22, 2011 – playing Le cagibi with Roxy auto-config + Luben : Nora Müller, Bohlen-Pierce clarinets and Todd Harrop, percussion; plus Robin Streb, viola and Myfanwy Alderson, 5-string basse pochette. 5490 St-Laurent, corner of St-Viateur, Montreal. 9 PM

Oct. 20, 2011 – playing L’envers with Roxy auto-config : Nora Müller, Bohlen-Pierce clarinets and Todd Harrop, percussion. Also playing: Géraldine Eguiluz with string quartet. 185 Van Horne, corner of Esplanade, Montreal. $8, 9 PM

Sep. 30, 2011 – performance of Der Zauberzephir and other works by Kretz, Mantovani and Galanta. Clarinet duo Nora-Louise Müller and Boglárka Pecze. Tanz- und Konzerthaus, Fackenburger Allee 78a, Lübeck, Germany. 20h00

Sep. 5, 2011 — premiere of Der Zauberzephir for Bohlen-Pierce tenor clarinet and electronics, performed by Nora-Louise Müller. Multimedia Centre KIBLA, Ulica kneza Koclja 9, Maribor, Slovenia.

Aug. 15–19, 2011 — played percussion in Die kleine Zauberflöte, adaptation of Mozart’s The Magic Flute by Gabriele Pott. Eutiner Festspiele, Schlossgarten Eutin, Germany.

June 19–July 3, 2011 – played percussion in The Megillah of Itzik Manger for Tel Aviv’s Yiddishspiel at The Segal Centre, Montreal.

March 30, 2011 — Love Pounds for solo percussion performed by Rob Phillips, B. Mus. graduating recital. Phillip T. Young Recital Hall, University of Victoria, BC.

Winter 2011 — Incantations performed by Kathryn Ladano and Marcus Quin, bass clarinet duo. Ontario: Waterloo, Peterborough, and Toronto.

Feb. 10, 2011 — premiere of Monco performed by Digital Prowess. University of Guelph, Ontario.

Jan. 22, 2011 — Contact/Maelstrom, structured improvisations on Bohlen-Pierce kalimba, tenor clarinet and pan flute with Nora-Louise Müller and Arturo Grolimund. Klub Katarakt: Lange Nacht. Hamburg, Germany.

July 10, 2010 — Lay Down Low concert of funky free improv at Café Lézard, 3119 rue Masson, Montreal. (Kathryn Ladano and me.)

May 30, 2010 — 60×60 DANCE Order of Magnitude. FoFA Gallery, Concordia University, Montreal. 11h00–21h00. (My piece around noon.)

March 7–9, 2010 — 1st Bohlen-Pierce Symposium. Playing two concerts with tranSpectra, including Calypso, and presenting my paper “Dissonance and the Bohlen-Pierce Clarinet.” Northeastern University and the Goethe Institut, Boston MA.

Dec. 17–20, 2009 — as guest artist with hometown community theatre company, music director and sound designer for The Secret Garden. Theatre Guelph, ON.

June 11–21, 2009 — acting and sound design, Terminal by Ron Kozloff. With Janice Wu. Montreal Fringe Festival.

April 29–May 2, 2009 — with Annette Urbschat, performed “Transportation Transformation in shades of rust,” a structured movement-improvisation scene for outdoor site-specific promenade opera Harbingers of Spring: a RARE Soundwalk. Open Ears Festival of Music & Sound, Kitchener ON.

April 28, 2009 — performance of Calypso plus playing and conducting in tranSpectra concert of Bohlen-Pierce music in Open Ears Festival of Music & Sound. Registry Theatre, Kitchener ON.

Sep. 11, 2008 — performance of Krakatoa’s Ash by Jessica Catron & Johnny Chang, ARTSaha! Festival, Omaha Nebraska.

March 25–April 13, 2008 — acting in Betrayal by Harold Pinter, directed by Daryl Cloran. Theatre & Company, Kitchener ON.

March 20, 2008 — début of tranSpectra ensemble and repertoire for two Bohlen-Pierce clarinets: Calypso by Todd Harrop and Wanderer by Owen Bloomfield. University of Guelph, ON.

Feb. 20, 2008 — premiere of Krakatoa’s Ash by Johnny Chang, Auckland, New Zealand.

Nov. 25, 2007 — premiere of Incantations for two bass clarinets, part of Alliance for Canadian New Music Projects. Bass Impact duo of Tilly Kooyman and Kathryn Ladano. Waterloo ON.

Sep. 27–Oct. 13, 2007 — acting and sound design for Terrence McNally’s Master Class, directed by Alison Grant. Theatre Athena, Waterloo ON.

March 30, 2007 — premiere of Mini Slur at Art for quintet. New Music Ensemble, dir. Aris Carasthatis. Lakehead University, Thunder Bay ON.

March 13–31, 2007 — acting in The Spitfire Grill, musical directed by Robert McQueen. The Grand Theatre, London ON.

Dec. 7–31, 2006 — acting in The Trial of Ebeneezer Scrooge, directed by Gil Garratt. Theatre & Company, Kitchener ON.

Nov. 22–26, 2006 — as guest artist with hometown community light opera company, music director, sound designer and conductor for The Sound of Music. Royal City Musical Productions, Guelph ON.

July, 2006 — workshop and performance of Delusions by Penderecki String Quartet. Casalmaggiore International Music Festival, Italy.

Dec. 21, 2005 — premiered new works by Aris Carasthatis and Darlene Chepil Reid for flute, marimba and cello; with Nancy Hennen and Colin Matthews. New Music in New Places, Thunder Bay ON.

April 30, 2005 — performed in multi-disciplinary work, Coyote Builds North America, text and music by Barry Lopez and John Luther Adams. Open Ears Festival of Music & Sound, Kitchener ON.

Mar. 5, 2005 — performed with DaCapo Chamber Choir, Leonard Enns cond., with Martin Gladman and Arun Pal, perc. Waterloo ON.

Jan. 25, 2005 — premiere of Something Sinuous by Jessica Catron & Johnny Chang, Los Angeles CA.

2004 — published in She Speaks: Monologues for Women, ed. by Judith Thompson. Playwrights Canada Press, Toronto ON.

Dec. 10–13, 2003 — performed in Court of Miracles with Dancetheatre David Earle. River Run Centre, Guelph ON.

Spring 2003 — performed in Boat Ballet in Budapest Park, site-specific dance-theatre by Maxine Heppner of Across Oceans. Wade Festival, Toronto ON.

Nov. 2001 — premiere of music-documentary Soybean Symphony on CBC Radio Two, co-produced with Steve Wadhams.

Nov. 2000 — performance of Marino-Armani by the Canadian Chamber Ensemble. Kitchener ON.

1999–2000 – drummer for Danny Johnson Trio, percussion instructor at Lakehead University, and timpanist with Thunder Bay Symphony Orchestra.

1 Response to Activity

  1. Dale says:

    Hi Todd, I want to ask for more info about a couple of your works for my Canadian Trombone Project. Please send me your email to dale [at] island trombone [dot] com. Thanks, Dale Sorensen.

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