• David Marsh at the University of Göttingen, Germany, and his collaborator Dave Ronan at AI Music produced the dark matter simulations used in Aura Satz’s sound installation (15 June, p 31).
• Rick Ostfeld works at the Cary Institute of Ecosystem Studies in Millbrook, New York (1 June, p 13).
• The piezo buzzer in our theremin should be connected to the 0 pin of the micro:bit circuit board (How to be a Maker, 15 June).
