Composition
* Premiere performances of Alleluia by Graces & Voices
* Da pacem published in Gregoriusblad Sept '23.
* 22 Oct: premiere performance of Patmos for organ
* New work for Overijssels Kamerkoor: A Clear Midnight (Whitman)
* New work for soprano Bobbie Blommesteijn: Vues des Anges (Rilke)

Musicology
* 31 Oct: speaker at Colloquium "La restauration du chant grégorien : Hommage à dom Joseph Pothier" at Saint-Wandrille Abbey (FR)
* New article on the Utrecht Pontificale for Tijdschrift van de Koninklijke Vereniging voor Nederlandse Muziekgeschiedenis
* New article on the 'quilisma' for Plainsong & Medieval Music, Cambridge

Gregorian chant
* Upcoming edition of the recently discovered Office of St. Jeroen with Attwater Books; presentation 10 Nov

* Upcoming publication (Jan '24) on chant in the Netherlands with Verloren
* Transcription of the Office of St. Walburga for Walburga's Church, Zutphen