A cross section of the challenge catalogue Home of creative music - Bach, Johann Sebastian 1685-1750; Piazzolla, Astor 1921-1992; Elgar, Edward 1857-1934; Beethoven, Ludwig van 1770-1827; Weckmann, Matthias 1619-1674; Schubert, Franz 1797-1828; Ginastera, Alberto 1916-1983; Röntgen, Julius 1855-1932; Gautier d'Epinal ca. 13. Jh; Grau, Christoph; Beethoven, Ludwig van 1770-1827; Beethoven, Ludwig van 1770-1827; et al. (Fono-Forum, 2007)