My research project, Portraits of the Air, was designed to engage members of the public in the collaborative creation of an orchestral symphony. Research shows that orchestras struggle to find new audiences. How could I engage a potential audience with my preferred medium? I asked the public, through social media and email lists, to send me sky photographs, and in return I composed a symphony. My PhD explores this collaboration. This video is a computer simulation of the symphony synchronised with photographs from my collaborators. This project was presented at the Musical Intersections in Practice conference, Cambridge University, in 2019.