"... organised, articulate and consistently perceptive. (...) the author's inquiring approach ensures that the discussion regularly moves beyond the insights of existing literature. Presentation is outstanding..."  - Prof. Robert Adlington

"Dankzij de gedrevenheid en de nauwkeurigheid van mensen als Tienstra zal het in de toekomst steeds beter mogelijk worden om dit soort verweesde getuigen (...) hun plaats te geven in de puzzel van de geschiedenis van het vaderlandse gregoriaans..."  - Vincent Wintermans

Gregorian Chant: a Guide to Interpretation and Conducting

'Gregorian Chant: a guide to interpretation and conducting' brings together the practical experience of chant performance and its long theoretical history. Intended for every plainchant lover who wants to know more about what they are singing and why, it examines such subjects as melody, rhythm, treatment of text and conducting technique, and provides clear references to both the available corpus and the wealth of secondary literature. Practical, inspired and critically aware, this handbook comes to the aid of conductors and singers who want their performances to be historically and theologically grounded as well as musically consistent. Guided by examples from a variety of sources, readers are invited to deepen their understanding of this music which has been a meaningful part of the liturgy for over 1200 years, but in which there is still so much to discover.

Available via: bol.com | Amazon 

Lamentations from the Low Countries: a performance edition

At various times and places, elaborate musical formulas (‘tones’) have been used for sung lessons on solemn liturgical occasions. The best-known are the tones used for the lessons of the first nocturn of the Night Office during the Triduum Sacrum. The first three lessons of each Night Office were taken from the Lamentations of Jeremiah. The current edition offers Lamentations as notated in five sources from the Low Countries. At present these are the only manuscripts from the region known to contain fully notated Lamentations. Although their number is small, each can be considered illustrative of a particular liturgical practice in the region. The aim is to make the notations available to and performable by a wider audience, and it is hoped that this edition will contribute to a deeper understanding and appreciation of the rich musical heritage of the Low Countries.

Available via: bol.com | Amazon 

Melodic Variation in Northern Low Countries Chant Manuscripts (PhD diss.)

When one realises that thousands of liturgical chants were transmitted over more than three centuries in which there were no accurate means of melodic notation, the core repertoire of Gregorian plainchant has been transmitted with an astonishing degree of uniformity.
On the other hand, these chants are reflections of a living liturgy, and thus reflections of their particular surroundings: any monastic or collegial environment could develop its own conventions in relation to what only seems to be a uniform repertoire at first sight.
Although relationships between specific manuscripts and their associated variants of Gregorian plainchant certainly exist, how the different variants of chants developed continues to be a highly debated topic. Moreover, how these different developments were valued has varied widely.
This study sets out to map the melodic variation occurring in northern Low Countries chant manuscripts from the oldest known notations to those of the sixteenth century, and to explore their relationships and attributions through this variation.

Available via: NL Mijnbestseller | DE Meinbestseller | UK Mybestseller | Amazon DE

The appendix of the dissertation is available for download here

Het oudste boek van Oegstgeest - Een laatmiddeleeuws gregoriaans zangboek 

The oldest and only surviving chant book of Oegstgeest dates from 1562, written at nearby Mariënpoel convent. It served only briefly till the infamous siege of nearby Leiden during the Dutch Revolt.
This attractive publication, richly illustrated, introduces the chant book’s creation, author, usage, liturgical context and its many peculiarities.

Written in collaboration with historian Freek Lugt.
Published by and available at Historische Vereniging Oegstgeest (Oegstgeest) | Amazon DE

The late choral works of Ton de Leeuw: an analytical study

Ton de Leeuw (1926–1996) is widely regarded as one of the most important post-war Dutch composers. Taught among others by Olivier Messiaen and Jaap Kunst, and strongly influenced by non-Western music, De Leeuw was a teacher at the University of Amsterdam and professor of composition and electronic music at the Amsterdam Conservatory from 1959 to 1986, a position in which he educated many Dutch composers active today. His book Music of the Twentieth Century, first published in 1964, is still regarded as an authoritative work.
Despite De Leeuw’s formidable reputation as composer and teacher, and the regular performance of his works, hardly any scholarly research into his oeuvre has yet been undertaken. The current study is an attempt to change this, exploring five of De Leeuw’s later choral compositions as representative of the style he described in terms of ‘extended modality’.
This study is aimed at understanding the nature and specificity of De Leeuw’s later choral works, and thereby clarifying the place of the composer’s later works – the choral works in particular – within the context of their time.

Published by University of Birmingham. Available via Donemus Publishing, The Hague. 

Publications

2022. '‘Een scheut van zijn wortels komt tot bloei’: het 'Veni, veni Emmanuel'', in: Gregoriusblad, September 2022. Utrecht: Gooi & Sticht.
2022. ''Dat uw belofte mij doet leven' -­ troost in de muziek', in: Hooglandse Nieuwe (XVIII-2), June 2022. Leiden: Ekklesia Leiden.
2022. Gregorian chant: a guide to interpretation and conducting. Rotterdam: MijnBestseller.
2022. Lamentations from the Low Countries - a performance edition. Rotterdam: MijnBestseller. 

2022. 'Dialoog en verkondiging: het ‘Victimae paschali laudes’', in: Tussenbeide, April 2022.  Antwerpen: Halewijn NV.

2021. '‘Midden in de winternacht’ - keer om!',  in: Tussenbeide, December 2021.  Antwerpen: Halewijn NV. 

2021. 'Afsmeken en prijzen: de litanie',  in: Tussenbeide, October 2021.  Antwerpen: Halewijn NV. 

2021. Review of Symphoniae - Gesänge der Hildegard von Bingen. Praxisbuch.  (Stefan Klöckner, Dominik Schneider, Ursula Wilhelm), in: Gregoriusblad, September 2021. Utrecht: Gooi & Sticht.

2021. 'Met barmhartige ogen: het 'Salve Regina'', in: Tussenbeide, July 2021.  Antwerpen: Halewijn NV. 

2021. 'De duisternis verdreven – een ontketende jubel', in: Tussenbeide, March 2021.  Antwerpen: Halewijn NV.
2020. ‘Antonio Caldara – Kapelmeester temidden van muzikale bloei’, in: Gregoriusblad, September 2020. Utrecht: Gooi & Sticht. 
2020. Melodic Variation in Northern Low Countries Chant Manuscripts (1150-1600). Rotterdam: MijnBestseller.

2018. 'Oude handschriften en hun praktische betekenis', in: Muziek en Liturgie, October 2018.

2018. ''In stillness every human being is great' - De liturgische muziek van Leonard Bernstein', in: Gregoriusblad, March 2018. Utrecht: Gooi & Sticht. 

2017. Het oudste boek van Oegstgeest - Een laatmiddeleeuws gregoriaans zangboek. (In collaboration with Freek Lugt.) Oegstgeest: Vereniging Oud Oegstgeest.
2017. 'Eén hand, twee tradities: de zangboeken van broeder Adriaan', in: Tijdschrift voor Gregoriaans, September 2017.

2017. ''Una nobile severità di canto' - De muziek van Domenico Bartolucci', in: Gregoriusblad, March 2017. Utrecht: Gooi & Sticht. 

2016. The Late Choral Works of Ton de Leeuw: an Analytical Study. (MA thesis, Birmingham University.) Available via Donemus Publishing, The Hague.

2016. ‘De religieuze muziek van Max Reger’, in: Gregoriusblad, June 2016.  Utrecht: Gooi & Sticht. 

2014. 'De erfenis van Jeroen vereeuwigd', in: Kernpunten 87.  Noordwijk: Vereniging De Oude Dorpskern.

2013. Past Traditions – Present Tense: Composing in Confluence with Gregorian Chant. (Master’s Research Conservatory of Amsterdam.) (Published in summary in: Tijdschrift voor Gregoriaans 2015.)

2012. Missa sancti Jeroni: de gregoriaanse misgezangen voor de heilige Jeroen van Noordwijk. Private publication.

2011. ‘Liturgie zonder en mét kerk’, in: Gregoriusblad, June 2011. Utrecht: Gooi & Sticht.