Denis Condon—an Australian piano roll pioneer and music educator—played a crucial role in promoting reproducing piano rolls. Trained at the Sydney Conservatorium of Music, he became known for his enthusiasm, musical skills, and collaborations with artists like Percy Grainger. Denis's influence extended through his Roll Night gatherings, attended by diverse audiences, and his role as a mentor to many musicians. He built player piano mechanisms and recorded performances, including famous works like Grieg's Piano Concerto with the Sydney Symphony Orchestra.