Polythematic imitative fantasia. This work seems too good to be true. Quite a little gem among the rubble. Could it be stolen or a parody? Work divides exactly into 2 sections each of 49 compases; each based on a single theme, but the theme of II is indeed a transformation of theme 1. Almost a monothematic work. I is through composed, dividing into 2 sections at bar 14. Ia is strict imitation, expanding texture. Ib starts with S/A – T/B pairs then expands again, 20-24 are free coda. Ib has freer use of theme: rhythmic variants, and added passing notes. II is voice pairs throughout except preparation for final K 46-49. II has repetition: 35-42 = 25-33; 46-49 = varied rep. of 41-44. 2 masterly chromatic versions of theme 2 given in Bass in 32 + 41 + 42.
The tonality of section I begins in F and ends in C. By the end section II it returns to F. Form almost binary c.f. Daza.
The clarity of this work is without precedent in Pisador, hence my suspicion. However, because it is such a clear work it provides good examples of the enormity of printing errors – especially in the sectional repetition.