Ton Koopman is a leading figure in Early Music and historically informed performance practice. As organist and harpsichordist Ton Koopman has performed all over the world and played the most beautiful historical instruments of Europe. His Amsterdam Baroque Orchestra & Choir has gained worldwide fame as one of the best ensembles on period instruments. Between 1994 and 2004 Ton Koopman and ABO&C have recorded all sacred and secular cantatas by Johann Sebastian Bach, an extraordinary project that earned international acclaim. After that Koopman recorded the complete works by Bach’s predecessor, Dieterich Buxtehude. Besides performing as a soloist and with his ABO&C, Ton Koopman is very active as a guest conductor for modern orchestras and also devotes part of his time to teaching. Ton Koopman is president of the International Dieterich Buxtehude Society and, since 2019, president of the Leipzig Bach Archiv.

Amaryllis Dieltiens studied piano and cello as a child but she was particularly immersed in sports as a dancer and gymnast. At age 17 she decided to follow her heart in music and she started her musical education at Lemmensinstituut Leuven where she studied voice with Lieve Vanhaverbeke. She continued her studies at the Conservatory of Amsterdam with Margreet Honig.

She specialised in opera for two years at the Dutch National Opera Academy where she performed several roles to great acclaim, including Morgana in Handel ’s Alcina, Tytania in Britten ’ s A Midsummer Night’ s Dream, Nella in Puccini ’s Gianni Schicchi and Belinda in Purcell’ s Dido and Aeneas. She graduated cum laude in 2006.

On the professional stage Amaryllis has performed roles including Belinda and Second Woman (Dido & Aeneas – H. Purcell), Zaïde (W.A. Mozart), Venus (Venus & Adonis – J. Blow), Diana (Siren Song – J. Dove), and Giulia (Arminio – H.I. Biber). In 2009 she made her debut at ‘Nationale Reisopera’ in Hippolyte & Aricie (J. Ph. Rameau) as both Prêtresseand Chasseresse. In 2011 she performed Angelica in Orlando by G.F. Handel with conductor Jan Willem de Vriend.

Amaryllis has sung with conductors Juanjo Mena, Henrik Schaefer, Richard Egarr, Alexander Rodin, Jos Van Veldhoven, Johannes Leerthouwer, Drik Vermeulen, Jed Wentz, Michel Tilkin, Jeremy Carnall, Erik Van Nevel, and worked with directors such as Eva Buchmann, Stephen Langridge, Elsina Janssen, Porgy Franssen, Wouter Van Looy, Jim Luccassen, Javier Lopez Pinon and Alexander Oliver.

In concert she has performed with renowned orchestras such as Residentie Orkest, Bergen Philharmonic Orchestra, Nederlands Philharmonisch Orkest, De Nederlandse Bachvereniging, Musica Ad Rhenum, B’ Rock, Noord Nederlands Orkest, Prima la Musica and with ensembles such as Combattimento Consort Amsterdam, Apollo Ensemble and Musica Amphion.

Her repertoire ranges from the early baroque to the modern era in both opera and oratorio. Amaryllis has performed at several well known festivals and concert halls over the last few years such as Festival Van Vlaanderen, Festival Oude Muziek, Grachtenfestival, Concertgebouw Amsterdam, BOZAR, De Doelen – Rotterdam, Theater Bonn, Theaterhaus Gesnerallee Zürich, and Festival de Otono Madrid.

Together with Bart Naessens she founded the ensemble ‘Capriola Di Gioia’. They share a passion for the 17th century and baroque repertoire and they rise to the challenge of performing this moving music in their own personal and expressive way.

Ton Koopman founded the Amsterdam Baroque Orchestra in 1979. The group consists of internationally renowned baroque specialists who meet up several times a year and work together to prepare and perform new exciting programmes. For the musicians each concert is a new experience and Koopman's boundless energy and enthusiasm are a sure guarantee of the highest quality.
The Amsterdam Baroque Choir was founded in 1992 and it made its debut during the Holland Festival of Early Music in Utrecht performing the world première of the Requiem (for 15 voices) and Vespers (for 32 voices) by H.I.F. Biber. The recording of both of these works won the Cannes Classical Award for the best performance of 17th/18th century choral music. For its rare combination of textural clarity and interpretative flexibility, the Amsterdam Baroque Choir is considered among today’s most outstanding choirs. In 1994 Ton Koopman and the Amsterdam Baroque Orchestra & Choir embarked upon the most ambitious recording project of the last decades: the integral recording of Bach’s secular and sacred cantatas. For this extraordinary project Koopman and his ensemble received the Deutsche Schallplatten-Preis Echo Klassik. Next to the CD recordings three books have been edited and published by Ton Koopman and the musicologist Christoph Wolff and a series of six documentaries was produced and broadcasted by various TV stations.
Alongside Bach’s music the Amsterdam Baroque Orchestra & Choir has recorded all major baroque and classical works. Major recognitions include the Gramophone Award, Diapason d'Or, 10-Repertoire, Stern des Monats-Fono Forum, the Prix Hector Berlioz and two Edison Awards. In 2008 the ensemble and Ton Koopman have been honoured with the prestigious BBC Award. Since March 2003 “Antoine Marchand”, a new sub-label of Challenge Classics, took over the release of Koopman’s new recordings and among many others has published 22 CD boxes of the Bach Cantatas, a new recording of the St. Matthew Passion (on CD and DVD) and St. Markus Passion of J.S. Bach (DVD), live recorded in Milan, as well as the first seven volumes of the Buxtehude Opera-Omnia Edition. Ton Koopman and the ABO & ABC are regular guests at the major concert halls of Europe, the USA and Japan. In the 2008/09 season they will tour extensively in Europe (Amsterdam, Paris, Madrid, Vienna, Milan, Cologne, Dresden, Düsseldorf etc) and in Far East with concerts in Hong Kong, Seoul and Tokyo.