The composer Rudolf Kelterborn about his work: “I call the ten compositions for baritone and piano ‘DUOS’ because the voice and instrument parts are treated musically with absolute equality and indeed often go their own independent ways. Two duos (‘Alles Gold’ and ‘Gegenlicht in den Bergen’) come from the ‘Ensemble-Book I’ for baritone and 14 instruments with texts by Erika Burkart (1990). The 10 duos do not form a complete cycle that can be heard only as an entire work. Smaller groups can be put together and presented according to text-related or musical aspects. The texts are by authors who have continued to inspire me for years.”