How tiny tweaks in music shape what we imagine

Lisa Lock
scientific editor

Robert Egan
associate editor

New research from the Sydney Music, Mind and Body Lab at the Sydney Conservatorium of Music has found that even the smallest of human touches in music can shape and enhance our imaginations. Mental imagery while listening to music often contains elaborate imagined narratives, sensory experiences such as pictures, smells, or movement, and abstract emotions, all simulated in the listeners' mind and shaped by the sounds they are listening to.
In the study, researchers asked 100 participants to imagine a journey while listening to repetitive drumming with or without random and subtle timing and loudness shifts—known as micro-variations—or in silence. Those who listened to drumming with micro-variations imagined traveling farther and for longer periods of time, and described more vivid and lifelike scenes in their imaginations.
The evoked imaginings were stronger when listening to music with micro-variation compared to music without them or to silence.
"What excites me is that these little details in music are something we can all feel, even if we don't always notice them consciously," said lead researcher Ceren Ayyildiz.
"It's not just technical perfection but the human 'touch' that makes music feel more alive and sparks the imagination," Ayyildiz said.
"The findings suggest that the tiny changes that are often characteristic of live human performance can meaningfully shape how music can spark imagination with various applications that influence everyday life—from creative work to therapy, or strategy games like chess."
"Even tiny fluctuations can make music more meaningful," said Ayyildiz. "It's a reminder that the human feel still matters."
Micro-variations in music
The , published in Scientific Reports, used detailed computer simulations to recreate the sound of drums. Researchers then simulated drum strikes that were either perfectly identical or included tiny, natural variations in loudness and timing—the kind that happen when a human plays, even without trying to be expressive. These acoustic models gave researchers precise control over how the drum was hit and how it sounded.
Researchers then analyzed listeners' mental imagery responses using Bayesian multilevel modeling to isolate the effects of these micro-variations.
The results show that small, random fluctuations—often introduced unconsciously by performers and independent of intentionally expressive variations—enhance how vividly listeners imagine. In addition, participants with the ability to be deeply immersed in music were found to be more likely to experience strong, vivid imaginary scenes.
Importantly, the imagination of those who had higher levels of musical training and the higher ability to deeply immerse themselves profited even more from micro-variations in the background drumming.
"One possible explanation for this finding is that listeners may perceive drumming with tiny random changes—a core component of human music performance—as more natural and organic by listeners," said Ayyildiz. "Previous studies suggest that the inherently human quality of these variations evokes a sense of authenticity and pleasantness absent from mechanical performances."
The findings suggest that the tiny changes that are often characteristic of human live performance can meaningfully shape how music can spark imagination, with implications reaching far beyond the concert hall.
Shaping imagination in the clinic and beyond
The results not only highlight the importance of subtle variations in performance, but also open avenues for understanding imagination in everyday life and clinical practice.
"Mental imagery already plays an important role in many Cognitive Therapies. Deliberately tailoring background music—for example through subtle changes in timing and loudness—could be used to either stimulate or dampen imagination depending on the specific therapeutic target," said senior author Dr. Steffen A. Herff, leader of the Sydney Music, Mind and Body Lab.
This deliberate shaping of micro-variations is something music makers have long experimented with, often intuitively.
For audio engineers and producers, the findings offer fresh insight into how subtle decisions in music production can influence important aspects of human cognition such as imagination.
"Micro-variations are already used in studio production as key aesthetic drivers in many forms of electronic dance music and hip hop," said Dr. Paul McDermott, a lecturer at Sydney Conservatorium of Music and one of Australia's leading electro-pop producers.
"Now we know they can also affect how listeners imagine and engage with music."
For performers, especially drummers, the results highlight the power of nuance.
"This study demonstrates how the tiny details in rhythmic timing and expression can greatly alter our perceptions of music," said Dr. Simon Barker, a jazz drummer and senior lecturer in Drum Set at the Sydney Conservatorium of Music.
"The relationship between micro-rhythmic variations and imagination, illusion, and connection are at the core of the art of drumming, and this study is a lovely example of this central aspect of rhythmic expression and communication."
This study joins a series of recent investigations into music and imagination, including work exploring its role in social interactions and loneliness.
More information: Ceren Ayyildiz et al, Micro-variations in timing and loudness affect music-evoked mental imagery, Scientific Reports (2025).
Journal information: Scientific Reports
Provided by University of Sydney