With this chamber choir, consisting of young, partly professional singers, who specialised in demanding and rarely performed works of all eras, Otto achieved international competition successes,[1] including: In addition to ancient music in historically informed performance, Otto has focused on contemporary music.

He was a regular guest at the Frankfurt Feste with numerous premieres, presenting works by composers such as Olivier Messiaen, Klaus Huber, Iannis Xenakis, Luciano Berio, Brian Ferneyhough, Gerhard Müller-Hornbach, Wolfgang Rihm, Anton Webern and Michael Gielen.

In addition, he collaborated with the Ensemble Modern and the London Sinfonietta Voices as well as with conductors Lothar Zagrosek and Gielen.

He has produced numerous radio and CD co-productions for the Hessischer Rundfunk, including in 1991 Bach's Christmas Oratorio, with Concerto Köln and soloists Ruth Ziesak, Monica Groop, Christoph Prégardien, Klaus Mertens.

[2][3] Otto added late romantic and contemporary music to their repertoire, including Schmidt's Das Buch mit sieben Siegeln, Hanns Eisler's Deutsche Sinfonie, Britten's War Requiem, Müller-Hornbach's Am Rande der Zeit and premieres by Tilo Medek.

Partners include the Bachorchester Mainz playing on historical instruments, the Munich Baroque orchestra L'arpa festante and the Staatsphilharmonie Rheinland-Pfalz.

The soloists in the Passion were Georg Poplutz as the Evangelist, Yorck Speer as the vox Christi, Julia Kleiter, Gerhild Romberger, Daniel Sans and Matthias Winckler.