Christian Goosses trat in Kontakt zur „Alte Musik“- Szene, spielte in Nicolaus Harnoncourts Concentus Musicus Wien und in Reinhard Goebels Musica Antiqua Köln. Außerdem musizierte er in Spezialensembles wie La Stagione Frankfurt, Concerto Köln und Cantus Cölln. In Freiburg war er einer der Initiatoren des Freiburger Barockorchesters, mit dem er durch Europa, nach Amerika und auch nach Südostasien reiste.

Christian Goosses war an zahlreichen CD-Einspielungen und auch DVD- Produktionen beteiligt, unter anderem für die Deutschen Grammophon und harmonia mundi france. Sie weisen ihn als vielseitigen Künstler aus, der zwischen Tradition und Gegenwart vermittelt.

Seit vielen Jahren ist er Mitglied des Schuppanzigh-Quartetts, mit dem eine rege Aufnahmetätigkeit mit Werken von Ferdinand Ries, L.v.Beethoven und J.Haydn entstand. Mit Anton Steck widmete er sich etwa 2008 auf CD Haydns Sonaten für Violine und Viola (Accent), mit Katja Grüttner Duos von Michael Haydn, Franz Alexander Pössinger und Franz Anton Hoffmeister.

Eine wichtige Aufgabe für ihn ist die Weitergabe seiner Erfahrungen an junge Musiker, daher leitet er Kurse für Kammermusik und Bratsche.

Afterwards Wolfgang Kostujak enrolled at the Sweelinck-Conservatorium, Amsterdam, where he studied the harpsichord with Bob van Asperen and Basso Continuo with Thérèse de Goede. In 1996 he finished these studies with the degree of a "Uitvoerend musicus". Since 1998 he teaches at the Folkwang University of the Arts, initially as a répétiteur and teacher of chamber music, which was expanded later to include the harpsichord and the theory and praxis of figured bass. Additionally, since 2009 his activities there include a series of regular, two-hour lectures dealing with historic performance practice as well as seminars about music editing and musical sources.


As a performer Wolfgang Kostujak has been to nations all over the world, such as Poland, France, Estonia, Austria, Italy, the Netherlands, Russia and China, as well as several South American countries where he performed both as a soloist and as part of continuo groups.
Since 1988 he has regularly been featured as a harpsichordist and organist on recordings for Radio Bremen, the Mitteldeutscher Rundfunk, DeutschlandRadio Berlin and the Südwestrundfunk as well as the ZDF and Arte.

Wolfgang Kostujak also works as a freelance radio writer for numerous public broadcasters (most prominently DeutschlandRadio Kultur, Deutsche Welle and the Westdeutscher Rundfunk) and as a writer for several magazines (including the "Neue Zeitschrift für Musik - Das Magazin für neue Töne”, Mainz, or "Concerto - Das Magazin für Alte Musik", Cologne) and as an editor for a number of music publishers (such as Henle, Schott, Güntersberg and Amadeus). In collaboration with Henrik Wiese a comprehensive edition of Johann Ph. Kirnberger's chamber music was published by Amadeus,  together with Thomas Kügler Wolfgang Kostujak published the recently discovered flute sonatas of Vivaldi's colleague Ignazio Sieber, and the Henle Urtext publishing house will soon publish a new critical edition of Georg Ph. Telemann's "Sonate Metodiche".

E-Mail:> kostujak(at)folkwang-uni.de

Since 2000 he dedicated himself to chamber music with the ARCANGELO TRIO. Another focus became the collaboration with the choreograph Joachim Schlömer for festivals in Vienna, Amsterdam, Bruges, Freiburg, Cologne and Ludwigsburg.As principle cellist Markus Möllenbeck was guest at the Musiciens du Louvre with Marc Minkowski, at the Freiburger Barockorchester, Concerto Köln, La Stagione Frankfurt with Michael Schneider and until today at the Capella Augustina with Andreas Spering. He worked in operas of Handel like RODELINDA, ALCINA and ARIODANTE at the State opera of Hamburg, Karlsruhe, Munich and Barcelona as a continuo cellist with Ivor Bolton, Michael Hofstetter and Harry Bicket. Möllenbeck is member of the Handel Festival orchestras in Karlsruhe and in Göttingen.

He is teaching with great passion giving master classes at the music universities of Detmold, Lübeck, Warshawa and Poznan, in Michaelstein, at the Handel Academy in Karlsruhe and since 2004 once a year at the international summer academy in Neuburg a.d.D. Between 1996 and 2012 he hold the class for baroque cello at the Berlin University of the Arts.Since 2005 Möllenbeck is teaching at the Folkwang University of the Arts in Essen and was appointed guest professor for baroque cello in 2011 at the Academy of Music in Bydgoszcz/Bromberg (Poland).

As a tutor he worked for the EUBO (European Barock Orchestra) with the director Lars Ulrik Mortensen in Echternach 2015, in Bukarest 2016 and will teach again in Echternach 2017.As an expert for the cello repertoire of the 18th century he published already 16 cello concertos of this period in his edition "Il Violoncello concertato" within the Edition Walhall of the Franz-Biersack-Company in Magdeburg like Caldara, Hertel, Hasse, Vivaldi, Vandini, CPE Bach and recently Anton Kraft.

E-Mail: > markus.moellenbeck(at)folkwang-uni.de

His first public appearances in recitals and competitions met with success, and after a one-year interlude
as an opera repetiteur and theater musician he became a member of the renowned ensemble Musica Antiqua Köln in 1994, while still a student. After six years, Rieger left the ensemble in order to dedicate himself more fully to solo harpsichord repertoire.
Ever since then, Rieger has been much in demand as a soloist and as a duo chamber music partner in festivals and recital series all over Europe, in North and South America and in Asia; he has also made several studio recordings.
With his knack for composition and improvisation, Rieger has written film music and has also returned to the theatre. In feature films directed by Dominique de Rivaz and Gerard Corbiau he has made contributions as arranger, composer and improviser. And as musical director he has been engaged by the opera houses of Stuttgart and Düsseldorf (where he conducted his own version of Offenbach's Belle Hélène).

After having held teaching posts in Berlin and Salzburg, Christian Rieger is in demand all over Europe as a masterclass professor and teacher. Since 2004 he has held the post of Professor of Historical Keyboard Instruments and Figured Bass at Folkwang University of the Arts, Essen.

E-Mail: > rieger(at)folkwang-uni.de

Since 2008 Michael Schmidt-Casdorff takes the position as Principal Flutist in the legendary "Orchestra of the 18th Century", founded by Frans Brüggen in Amsterdam. Even after his death in 2014, musicians from 15 nations gather for four to five projects each year, driven by a confident perspective for the future.

Also as the Principal Flutist, Michael Schmidt-Casdorff was involved in many opera and oratorio productions since 2008 with Thomas Hengelbrock and his Balthasar-Neumann-Ensemble, for instance in Baden-Baden, Paris, Madrid and New York. In the Wagner-year 2013 a much respected performance of Parsifal was presented.

In addition he was very previliged to be invited to many projects by Alice and Nikolaus Harnoncourt with Concentus Musicus Wien. This put him as one of the very few musicians into the position of having worked together intensively with the two companions Brüggen and Harnoncourt.

Michael Schmidt-Casdorffs activities as a soloist, but also as an orchestral musician are documented in a wide variety of CD and DVD-recordings, for example:

• windquintets by M.J. Mengal and pianoquintets by F. Danzi together with the "Reicha'sche Quintett" and Christine Schornsheim (fortepiano)
• all trios by Chr. Dickhut for flute, horn and  guitar, together with Ulrich Hübner (natural horn) and Ansgar Krause (guitar)
• 12 Telemann Sonatas from 1734, released by NCA
• with the Orchestra of the 18th Century: many Rameau Orchestral Suites, Bachs B-Minor Mass, St. John Passion and Easter-Oratorio, Mendelssohn Symphonies 3&4, Mozarts last three Symphonies and Chopins Piano Concertos.

Apart from playing original instruments out of his collection Michael Schmidt-Casdorff preferrably uses instruments by Martin Wenner, Singen (Germany). From 2003-2008 he taught traverso at the Music-Highschool Munich. He was instructor of many musical courses, i.e. in Basel, Warsaw, Karlsruhe, Salzburg, Düsseldorf, and Neuburg/Danube.

Momentarily Michael Schmidt-Casdorff teaches at the Folkwang University of the Arts and at the Music Academy Feliks Nowowiejski in Bydgoszcz (Poland).

E-Mail: > michael.schmidt-casdorff(at)folkwang-uni.de

Als Konzertmeisterin vielfältiger Projekte leitete sie u. a. das Budapest Festival Orchester oder die Kammerphilharmonie Bremen und veranstaltet Workshops für Orchester, die ihre Kenntnisse in der Spielart der historischen Aufführungspraxis vertiefen wollen. Zu ihren Kammermusikpartner zählen Christian Rieger, Jaap ter Linden oder Andreas Staier. 2015 erhielt sie den Sächsischen Mozartpreis.

Ihre umfangreiche Diskographie enthält Violinkonzerte von Mozart, Rimskij-Korsakoffs „Sheherazade“ oder ihre eigene Rekonstruktion des verschollenen Violinkonzertes von Bach BWV 1052. Von der langjährigen Zusammenarbeit Jos van Immerseel zeugen die Einspielungen sämtlicher Sonaten für Violine und Klavier von Mozart, Beethoven und Schubert. Großes Medienecho erfuhren ihre beiden Veröffentlichungen der Bachschen

Solowerke.

Von 2010 bis 2013 war Midori Seiler Professorin an der Hochschule für Musik Franz Liszt in Weimar, wechselte 2014 für eine Professur an die Universität Mozarteum Salzburg. 2017 ist sie an die Hochschule nach Weimar zurückgekehrt.

Seit 2016 ist Midori Seiler die künstlerische Leiterin des BachCollektivs der Köthener Bachfesttage. Ihre Experimentierfreude mit ungewöhnlichen Konzertformaten ließ Zusammenschlüsse mit zeitgenössischem Tanz, elektronischer Musik und choreographiertem Spiel entstehen: so erarbeitete sie - choreographiert von Juan Kruz de Garaio Esnaola - die Bachschen Sonaten für Violine solo mit zwei Tänzern. Ihr letztes Album „La Venezia di Anna Maria“ mit Concerto Köln wurde 2019 mit dem OPUS Klassik ausgezeichnet.

Seit April 2020 lehrt Midori Seiler als Professorin für Barockvioline im Fachbereich Musik an der Folkwang Universität der Künste.

E-Mail: > midori-clara.seiler(at)folkwang-uni.de