Oskar Bie, History of the pianoforte and pianoforte players (1899)
“ In Kalkbrenner we see the lowest type of the time. Externally a fine gentleman and artistic man of the world, he is inwardly hollow and vapid. It is hard even to give an idea of this extreme emptiness; but it is well illustrated in such a piece as the “Charmes de Berlin.” This great virtuoso won his triumphs in the worst kinds of salon-music as well as with all sorts of Études, Concertos, and Sonatas. Le Rêve, Le Fou, La Solitude, Dernières Pensées Musicales, La Mélancolie et La Gaité, La Brigantine, are some of these detestable compositions. But his opera fantasias touch the very nadir. ”
