Music Theory (Fugue)

Just to share with you some music theory that I'm memorising daily now =)

Fugal (fugue) form

• Usually considered as a style of writing than as a form.
  
• It is a contrapuntal piece founded on a theme, usually short, called the subject and is written for two or more voices or parts.
• For analytical purposes, it is divided into 3 sections :

1. Exposition : In which parts enter in turn with alternately subject, in tonic key and its transposed form (the answer) in dominant
2. Middle Section: In which entries of subject and answer appear in keys other than those in the exposition, with episodes to link them and to effect the modulations.
3. Final Section : In which a return is made to the tonic key and at least one entry of subject is heard in that key. But in practise once the exposition is completed there is no fixed procedure.

Various devices can be used, by the composer, such as Augmentation, Diminution, Pedal-point, Stretto.
eg) Cat's Fugue by Scarlatti
Prelude & Fugue in Bb, no21, bk1
Prelude & Fugue in D minor, No6, bkII