As fans of Haydn, 2009 represented a particular challenge for ad libitum. The brief was to create a website with continuous availability of every fact related to Joseph Haydn's 107 symphonies for fans, musicians and performers, as well as academics. It is a website for learning and studying, but also for enhancing one's personal repertoire, expanding academic horizons and compiling future concert programmes.
The homepage offers more than 1.100 sound clips and more than 4.500 pages of score. Visitors are thus able to listen to each of the 107 symphonies and at the same time follow them from each of the 414 scores. At the same time visitors can call up all the necessary information about the symphonies, helping them to better appreciate the work in question.