de la Cour is active as a vocalist, electric guitarist, and clown, performing works by Michael Finnissy, Chris Newman, Matthew Shlomowitz, Alwynne Pritchard, Neil Luck, Claudia Molitor, Johannes Kreidler and Trond Reinholdtsen.
de la Cour has performed Schoenberg's Pierrot Lunaire (voice) with Ensemble Reconsil, with past performances in Kazakhstan, Kyrgyzstan, and The Arnold Schoenberg Centre in Vienna.