Music Helps Sleep Onset in Insomnia, but Neural Synchronization May Not Be Why
Sleep-onset insomnia affects a large portion of the modern population, and many people already reach for music as a self-treatment. A new study from Aarhus University provides rigorous EEG evidence that listening to music does accelerate the transition from wakefulness to sleep in people with insomnia. But the mechanism is not what many researchers assumed.
The study, published June 11 on bioRxiv, recruited 53 adults with sleep-onset insomnia and monitored their brain activity during a 30-minute afternoon rest period using electroencephalography. Participants were randomly assigned to either listen to music from a curated sleep playlist (24 participants) or rest in silence (29 participants). The researchers used the delta-alpha ratio of the EEG signal to measure the transition from wakefulness toward sleep.
The music group showed a significantly higher degree of sleep-directed transition over the 30-minute period compared to the silence group. This confirms, under controlled laboratory conditions, what many anecdotally report: music can hasten falling asleep.
What they found
The team also investigated the mechanism proposed in popular and scientific literature: that music’s steady beat entrains brain oscillations, pulling neural activity into a sleep-favorable rhythm. Using an EEG frequency tagging approach, they measured whether participants’ brain waves synchronized to the musical beat.
They found that stronger beat stability in the music did produce stronger neural frequency tagging at the beat frequency. In other words, the brain does lock onto the rhythm of the music. However, there was no statistical relationship between the strength of this neural synchronization and how quickly participants moved toward sleep.
This result suggests that while music helps with sleep initiation, the mechanism is not simply a matter of brainwave entrainment to the beat. Other features of the music, or the psychological response to it, may be doing the work.
Why it matters
Insomnia is the most common sleep disorder, and sleep-onset difficulty is its hallmark symptom. Pharmaceutical options carry side effect burdens and dependency risks. Music is free, accessible, and carries virtually no downside. Understanding why it works, and that it works even in people with diagnosed sleep-onset insomnia, strengthens the case for music-based interventions as a first-line approach.
The finding that neural synchronization to the beat is not the driver opens new questions. It shifts attention to other musical features such as tempo variability, timbre, melodic contour, or the emotional and attentional effects of music as possible mechanisms.
Limits
The study was conducted during a daytime nap, not at bedtime. Sleep initiation during an afternoon rest may differ from nighttime sleep onset. The sample was relatively small (53 participants), and the study is a preprint posted on bioRxiv, meaning it has not yet undergone peer review.
Bottom line
Music helps people with insomnia fall asleep faster, but the mechanism may not be the brain synchronizing to the beat. Researchers should look elsewhere in the music for the sleep-promoting ingredient.
Source: Jespersen KV, Celma-Miralles A, Vuust P. Music facilitates sleep initiation in adults with sleep-onset insomnia: The role of neural synchronization. bioRxiv. 2026. DOI: 10.64898/2026.06.09.731083