In 1990, Mayr was the coordinator of Laboratory of "Progettazione Temporale" by Filcams/CGIL in Florence. In 1994, he was coordinator of the "Il Castello Del Tempo" meetings, organized by "Provincia di Firenze" at Pratolino-Villa Demidoff's park. Since 1995, he has been a member of Forum für Klanglandschaft.
