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Fugue

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A fugue is a complex musical technique used in two or more voices. It relies on a method called polyphony, which means many musical lines play at once. The term comes from the Latin word "fuga," meaning "to flee" or "to chase."

Ricercare a 6 from The Musical Offering
Ricercare a 6 from The Musical Offering

This name describes how the musical voices seem to chase one another. A fugue is actually a style of composition rather than a strict structural form. This is because the composer has the freedom to decide many structural elements. It is a way to show a master's skill in harmony and counterpoint. Counterpoint is the art of combining different melodic lines so they sound good together.

The process of a fugue begins with a specific section called the exposition. It starts with a single voice playing a short main theme called the subject. This subject is played in the starting key, known as the tonic.

Wiki-fugue-analysis
Wiki-fugue-analysis

Soon, a second voice enters to play the subject in a new key. This second version is called the answer. The answer is usually in the dominant or subdominant key. If the answer is an exact copy of the subject, it is a real answer. If the composer changes a few notes to help the harmony, it is a tonal answer. While the second voice plays the answer, the first voice plays new material. If this material repeats later, it is called a countersubject. If it only plays once, it is called free counterpoint.

Interval Inversion
Interval Inversion

To make a countersubject work, composers use invertible counterpoint. This means the music must sound correct whether it is played above or below the subject. Composers must follow strict rules because some musical intervals change when they are flipped. For example, a perfect fifth is acceptable in one direction. However, when inverted, it becomes a perfect fourth, which is a dissonance. A dissonance is a sound that feels unstable and needs to be resolved. During the exposition, a composer might use a short connecting passage called a codetta. A codetta helps smoothly transition between the different keys used in the subject and answer.

After the exposition is complete, the fugue moves into the development stage. This section contains middle entries where the subject appears again. These entries often happen in related keys, such as the relative major or minor.

Beethoven Op 131
Beethoven Op 131

To move between these keys, composers use episodes. An episode is a passage that uses new material or fragments of the subject. These episodes provide a break from the strict rules of the exposition. They also help the music transition or "modulate" into a new key. Sometimes, the voices will overlap very quickly in a technique called stretto. In stretto, the subject begins in one voice before the previous voice has even finished it.

The fugue eventually reaches its conclusion with a final entry. This entry brings the subject back to the original tonic key. This creates a sense of returning home after a musical journey. Sometimes, a composer adds a coda, which is a short piece of music at the very end. The fugue is a highly organized way to present imitative counterpoint. This means one voice imitates the melody of another. By the time the final note is played, the listener has heard the subject transformed through many different voices and keys.

Fugues have a long history in Western music. In the Middle Ages, the term described any music written in a canonic style. By the Renaissance, it specifically meant imitative works. The fugue evolved during the 18th century from older styles like the ricercar, the capriccio, and the fantasia.

Ricercare a 6 from The Musical Offering
Ricercare a 6 from The Musical Offering

Johann Sebastian Bach, who lived from 1685 to 1750, was a master of this style. He shaped his fugues after earlier composers like Jan Pieterszoon Sweelinck and Johann Pachelbel. While the fugue's central role declined as the symphony and sonata form became popular, it never truly disappeared.

Many famous composers have used the fugue to add depth to their music. Wolfgang Amadeus Mozart and Ludwig van Beethoven both wrote fugues.

Jupiter finale
Jupiter finale

For example, Mozart used a fugal passage in his Symphony No. 41, the "Jupiter." Even modern composers like Dmitri Shostakovich and Paul Hindemith studied and used fugal techniques. The fugue remains a vital connection between the Baroque era and modern musical thought. It shows how mathematical precision and artistic expression can work together in a single piece of music.

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🖼️ Images & Media (10)
File:Ricercare a 6 from The Musical Offering.jpg
Ricercare a 6 from The Musical Offering.jpg
File:Interval Inversion.jpg
Interval Inversion.jpg
File:Wiki-fugue-analysis.jpg
Wiki-fugue-analysis.jpg
Wiki fugue analysis audio.mid
File:Fischer-fugue1.png
Fischer-fugue1.png
Fugue in C major by Johann Caspar...
File:Jupiter finale.png
Jupiter finale.png
File:Beethoven Op 131.png
Beethoven Op 131.png
File:Liszt B minor sonata fugue subject.png
Liszt B minor sonata fugue subject.png
File:Bartok - Music for Strings, Percussion and Celesta interval expansion.png
Bartok - Music for Strings, Percussion...
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