Fugues typically have a main theme, or “subject,” that serves as the foundation for the entire composition. This subject is introduced in one voice, then imitated by another voice, usually at a different pitch. This process of imitation is one of the defining features of a fugue, and it continues throughout the entire piece as different voices take turns playing the subject and its variations.
The subject of a fugue is often quite simple and straightforward, but it can be transformed and developed in countless ways. Composers might invert the subject (play it upside-down), play it backwards, or combine it with other melodies to create more complex textures. The result is a rich and varied tapestry of sound that can be both exhilarating and challenging to follow.
One of the most famous examples of a fugue is Johann Sebastian Bach’s Toccata and Fugue in D minor. This piece, originally written for the organ, begins with a fiery and virtuosic toccata that gives way to the majestic fugue. The subject of the fugue, a descending chromatic figure, is simple but haunting, and Bach uses it to create a vast and intricate sonic landscape.
Bach was a master of the fugue, and he wrote many works in this style for a variety of instruments and ensembles. His Well-Tempered Clavier, a collection of preludes and fugues in all 24 major and minor keys, remains one of the ultimate challenges for any keyboard player. Each prelude is a brief and expressive introduction to the following fugue, which might take several minutes to unfold.
But fugues are not just relics of the past. Many modern composers have adapted the fugue form to their own purposes, creating works that explore new sounds and musical ideas. One example is György Ligeti’s Requiem, a haunting choral work that includes a complex and dissonant fugue. Ligeti’s fugue is far removed from Bach’s orderly and precise contrapuntal style, but it still showcases the inherent beauty and complexity of the fugue form.
Learning to appreciate and understand fugues can be a rewarding experience for any music lover. It requires a certain amount of patience and concentration, but the payoff is a deep and lasting connection to some of the greatest music ever created. Whether you are listening to Bach or Ligeti, or even trying to write a fugue of your own, the fugue remains a vital and vibrant part of the musical landscape.