|Source title||Señalase la claue de fefaut segunda en primero traste D[ificil]|
|Title in contents||Fantasia por el primer tono|
Fantasia type Imp
Length (compases) 87
Tempo not specified
Vocal notation puntillos
Polythematic, imitative fantasia. Each independent section is based on a single theme, with a small amount of free extension, and each section concluded with a decorated cadence.
Episodic divisions (compases):
Voice pairing is used quite a deal throughout, particularly at the beginning of each episode. Subsequent entries are spaced a little further apart.
Falling 3rds characterise the first three themes; the latter ones rise with a leap and then descend by step.
1. The opening theme is found in other works. (Fabrizio, Milán)
2. Unusually large number of thematic entries (twice in each voice): B-T-S-A-B-T-A-S-B-T
4. interlocking voice pairs of themes 4a and 4b, presented T/B, S/A