Founded by violinists Amaryllis Billet and Anna Jalving, with Fanny Paccoud on viola and Sarah Ledoux on cello, Quatuor Umlaut presents their first recordings, joined by clarinetist Joris Ruhl for two pieces: "Calques" by composer Karl Naegelen using effects of transparency and fusion of tones; and Morton Feldman's highly textured "Clarinet and String Quartet".