'Curva Triangulus' is a superb composition from 2021 by Catherine Lamb, written for and played by Ensemble Proton, who are based in Bern, and have access to some of the unusual instruments used in piece, including arciorgano, baroque triple harp, lupophone and contraforte. More details about the piece can be found in Catherine Lamb's and Richard Haynes's sleevenotes, which are included as bonus items with the music.
Ensemble Proton
Bettina Berger - flute, alto flute
Martin Bliggenstorfer - cor anglais, lupophone
Richard Haynes - clarinet d’amore, bass clarinet
Elise Jacoberger - bassoon, contraforte
Vera Schnider - triple harp
Coco Schwarz - arciorgano
Maximilian Haft - violin
Jan-Filip Ťupa - violoncello