Commissioned by Internationale Hugo-Wolf-Akademie. 'A grand piano. At its keys, a pianist. Under its body, a professional singer, lying down. Both performers hold their own spiral hose, winding from mouth to piano. The soundboard forms the membrane between the performers. Membran was written for a festival of lieder songs for voice and piano. They asked me if it was possible for me to write a lied, says Carola.

She began experimenting, singing through a tube into the body of the piano. She fo...