25.02.2013: “It was such an honour to work with Christoph. His musical in- and output has been truly enriching and fascinating. His blending, his solos and vocal range, his musicality, his boundless motivation, his high musical and  vocal demands on himself and his fellow vocalists and last not least his great sense of humour have given us many good and productive weeks. We fondly think back on our collaboration, he is a fantastic team player! We would happily work together again, anytime”!