1. Felipe Otondo, Art and Technology Lab, Institute of Acoustics, Universidad Austral de Chile, Casilla 567, Valdivia, Chile. Email: <felipe.otondo@uach.cl>. Websites: <www.otondo.net> <www.soundlapse.net>
2. André Rabello-Mestre, Art and Technology Lab, Institute of Acoustics, Universidad Austral de Chile, Casilla 567, Valdivia, Chile. Email: <andre.rabello@uach.cl>. Websites: <www.andremestre.info> <www.soundlapse.net>