Tiensuu also frequently uses microintervals. His own instrument is the harpsichord, and he is keeping up a constant dialogue with the past. Since the 1980s, he has refused to comment on his own music (no liner notes, no interviews), preferring to let the music speak for itself. He was among the founders of both of Finland’s leading contemporary music festivals, Musica nova Helsinki and the Time of Music festival in Viitasaari.