For decades, music critics and historians have debated whether the “golden ages” of composition—the intricate fugues of the Baroque era or the daring improvisations of early bebop—have been eclipsed by a modern preference for the predictable. While these discussions usually live in the realm of subjective taste, new mathematical evidence suggests that the evolution of music is moving toward a measurable simplification.
A comprehensive analysis published in Scientific Reports reveals that jazz and Western classical music are increasingly mirroring the melodic and harmonic structures of pop and rock. By stripping music down to its numeric essence, researchers found that the complex, varied patterns that defined these genres in the early 20th century are gradually giving way to more repetitive, uniform frameworks.
The shift does not necessarily signal a decline in artistic quality, but it does highlight a profound change in how music is constructed and consumed in the digital age. According to the researchers, the tools we use to create music are fundamentally altering the “musical space” that artists explore.
The Mathematics of Melody
To quantify the evolution of sound, Niccolò Di Marco, a computational social scientist at the University of Tuscia in Viterbo, Italy, and his colleagues moved away from the subjective experience of listening. Instead, they analyzed 21,480 musical pieces across six distinct Western genres: classical, electronic, hip hop, jazz, pop, and rock.
The team utilized MIDI (Musical Instrument Digital Interface) files, a technical format that encodes musical information—such as pitch, timing, duration, and loudness—into numeric values. This allowed the researchers to treat music as a data network. By mapping the relationships between notes—specifically which notes follow others and the intervals between them—they could visualize the structural “complexity” of a piece as a mathematical web.
The findings showed a stark contrast between eras. In the first half of the 20th century, jazz and classical compositions exhibited high variability and complex networks of note transitions. However, in more recent decades, these genres have trended toward the repetitiveness and structural uniformity typically associated with pop and rock.
| Genre Group | Early 20th Century Pattern | Modern Structural Trend |
|---|---|---|
| Jazz & Classical | High variability; complex harmonic networks | Increased repetitiveness; simplified intervals |
| Pop, Rock & Electronic | Relatively uniform distributions | Consistent structural simplicity |
The Digital Influence and the ‘Minimalist Shift’
Di Marco suggests that this evolution is not happening in a vacuum but is heavily fueled by the democratization of digital technology. The ubiquity of Digital Audio Workstations (DAWs), software-based composition tools, and the instant accessibility of recorded music have changed the creative process.
When musicians rely on digital grids and quantization—tools that snap notes into a rigid temporal alignment—the organic, complex deviations of live performance and traditional composition can be smoothed over. The ease of accessing a global library of hits may lead creators to subconsciously gravitate toward the “proven” structures of successful pop music, creating a feedback loop of simplification.
This trend extends beyond the auditory. Di Marco has also investigated the visual side of the industry, noting a broad shift toward minimalism in album cover art. This suggests a wider cultural movement where both the sonic and visual signatures of music are becoming more streamlined and less ornate.
Complexity vs. Quality
The study’s findings have sparked a necessary conversation about the difference between mathematical simplicity and artistic value. The researchers are careful to note that their work measures the framework of the music, not the emotional impact or the overall quality of the listening experience.
Many elements of modern music—such as intricate sound design, sophisticated production, lyricism, and cultural context—cannot be captured in a MIDI file. A song may be harmonically simple but emotionally profound or technically groundbreaking in its production. As Di Marco notes, modern creators are simply finding “a different way to create great music.”
Friedlind Riedel, a cultural musicologist at the University of Salzburg in Austria, argues that the anxiety surrounding this simplification is a recurring theme in art history. She describes this as “cultural pessimism”—the fear of a “cultural gray-out” where diversity vanishes in favor of a bland average.
However, Riedel points out a critical paradox: while individual songs might be getting mathematically simpler, the average listener’s diet has never been more diverse. Through streaming services, a listener can jump from a 17th-century concerto to a modern K-pop track in seconds, meaning that while the structures may be converging, the opportunities for discovery are at an all-time high.
The Future of Musical Evolution
The convergence of genres suggests that the boundaries between “high art” (like classical and jazz) and “popular art” (like pop and rock) are blurring. This suggests a future where music is defined less by rigid genre rules and more by a hybrid, globalized sound palette.
The next phase of this research will likely involve analyzing how AI-generated music—which is trained on existing patterns—will further impact these structural trends. As generative AI continues to synthesize music based on the most “statistically probable” note sequences, the tension between mathematical simplicity and human complexity will likely become the central conflict of modern composition.
We invite you to share your thoughts in the comments: Do you feel that modern music has lost its complexity, or has it simply evolved into a different kind of beauty?
