Fantasia in d minor K397

This fantasia is in two parts :
- the first one is "dark Mozart" as can be for instance his a minor piano sonata, with some anguished moments and also some opera-like bars ;
- the second one is "smiling Mozart". However, musicologists say that this second part would not have been written by Mozart but by an A.E. Müller after Mozart's death. Anyway, it really sounds like Mozart.