This slide show is a recording of Prelude and Fugue in F Major Op. 27 from Five Preludes & Fugues Op. 24-28 by Steven Monrotus.

The Prelude is in the 6-part form Louis Vierne taught his students for improvisation on a single free theme.  Its theme was obtained by rhythmic transformation of the Fugue's 2nd countersubject.  The related 4-voice Fugue which follows has two countersubjects written in triple counterpoint.

The audio clip is computer generated and merely gives an idea of what this music might sound like on the real McCoy.