The middle section may feature stretto, augmentation, or inversion in a series of episodes.  
The middle section may feature stretto, augmentation, or inversion in a series of episodes.  The ricercare and canzone are derived from this form whose notable examples include twelve alternating with interludes in Hindemith's Ludus Tonalis, the final section of Brahms Variations on a Theme by Handel, and the 95 for the organ written by Pachelbel.  FTP, identify this musical form that begins with a subject followed by an answer in a different voice, a form mastered by JS Bach in his Musical Offering and Well-Tempered Clavier.
The middle section may feature stretto, augmentation, or inversion in a series of episodes.  
fugues