The piano and violin have a long tradition of studies, caprices and educational tracks: suffice it to recall the 24 studies of Chopin or 24 Paganini caprices. As for the flute we get to 900 to find the 30 caprices op. 107 of Karg-Elert cahier a study of high artistic level. The caprices of Karg-Elert fully meet the new demands of virtuoso flute Boehm matching technical difficulties with a robe of great musical interest. Their brevity makes every whim rise to a sort of technical and expressive paradigm, an aphorism meaningful music. No 3 is a Baroque (Handel wrote the Karg-Elert), no 5 points out of a score playing Bach's violin, the No 14 echoes in an apparent caprice No 1 for Violin Paganini No 21 a waltz but lost the prosperity of Strauss and the No 30 is a chaconne, a homage to Bach and the art of variation and therefore larger than the other whims. Wherever an apparent fury irreverent, almost futuristic (Karg-Elert writes in indications "As soon as possible", "with fire", "humorous," "bold, capricious") and a chromaticism  between the archaic and the modern. Despite the extreme virtuosity of many of the 30 caprices their right interpretive key, however, coincides with the title of the sonata for solo flute, Op. 140 "Appassionata" played with passion or just an abused term but applicable "with heart" is in fact able to fully grasp the deeper meaning.