Centre for Digital Music, School of Electronic Engineering and Computer Science, Queen Mary University of London, London E1 4NS, UK; Centre for Digital Music, School of Electronic Engineering and Computer Science, Queen Mary University of London, London E1 4NS, UK; Dyson School of Design Engineering, Faculty of Engineering, Imperial College London, London SW7 2AZ, UK; Centre for Digital Music, School of Electronic Engineering and Computer Science, Queen Mary University of London, London E1 4NS, UK; Centre for Digital Music, School of Electronic Engineering and Computer Science, Queen Mary University of London, London E1 4NS, UK