Klaus Mertens and consistency, Klaus Mertens sang in every piece that required a bass soloist, 190 in all." He is also involved in the project Dieterich Buxtehude – Opera Omnia of the same ensemble to record the complete works of Dieterich Buxtehude, begun in 2005. As a singer of lieder, he has interpreted songs of Claudio Monteverdi, Antonio Caldara, Wolfgang Amadeus Mozart and Franz Schubert among others. He has performed the title roles of the romantic oratorios "Elijah" and "St. Paul" by Mendelssohn and, as music of the 20th century, Paul Hindemith's "Requiem" and Igor Stravinsky's "Oedipus rex". In the classical repertory
Charles Paul (composer) Turns". Paul created character themes for Nancy Hughes (Helen Wagner), Pa Hughes (Santos Ortega) and Lisa (Eileen Fulton). He wrote motifs for opening scene shots that identified settings, such as Memorial Hospital and the Lowell, Barnes, Lowell & Hughes law firm. Paul also wrote the first theme song for NBC's "Another World" which was handled by other organists. Though he was not named in the credits, Paul provided the original scores to headwriter Agnes Nixon's ABC hits "One Life to Live" and "All My Children" under the auspices of Aeolus Productions. In the summer of 1969, many behind-the-scenes shifts occurred