1. School of Information Studies; McGill University; 3661 Peel; Montreal; Quebec; H3A 1X1; Canada
2. Laboratoire d'informatique fondamentale de Lille; Université de Lille 1, IRCICA, Parc Scientifique de la Haute Borne; 50 avenue Halley, B.P. 70478; 59658; Villeneuve d'Ascq; France
3. School of Information Studies; McGill University and Centre for Interdisciplinary Research on Music Media and Technology; 3661 Peel; Montreal; Quebec; H3A 1X1; Canada