Bilateral Music vs Binaural Beats: What's the Difference and Which Should You Use?

Search for calming audio and you'll quickly run into two terms that sound almost the same: bilateral music and binaural beats. Both involve your left and right ears, both are sold as ways to relax or focus, and plenty of tracks use the labels interchangeably. They are not the same thing.

Bilateral music moves a sound from one ear to the other. Binaural beats play a slightly different tone in each ear and let your brain create a third "beat" between them.

One is about movement, the other is about pitch. This post explains how each works, what the research says, and how to choose between them.

What is the difference between bilateral music and binaural beats?

Bilateral music alternates a sound between your left and right ear at a steady pace, so you hear it travel back and forth. Binaural beats play two steady tones at slightly different pitches, one in each ear, and your brain perceives a pulsing beat at the difference between them. Nothing actually moves.

A quick comparison:

• What you hear: with bilateral music, a tone or instrument sweeping left and right. With binaural beats, a gentle wobble or pulse that seems to sit inside your head.

• Where the idea comes from: bilateral music borrows the left-right stimulation used in EMDR therapy. Binaural beats come from acoustics research going back to the 19th century.

• What it claims to do: bilateral music is mostly used to feel grounded and settled. Binaural beats are usually marketed for relaxation, focus or sleep, based on the idea that they nudge brainwaves towards a target frequency.

• What you need: bilateral music needs stereo, through headphones or speakers placed on either side of you. Binaural beats need headphones.

  
  

How binaural beats work

Binaural beats were first described by the German physicist Heinrich Wilhelm Dove in 1839, and interest grew after Gerald Oster wrote about them in Scientific American in 1973.

The effect works like this. Play a 200 Hz tone into your left ear and a 210 Hz tone into your right, and you'll perceive a beat of 10 Hz, the difference between the two. The beat isn't in the recording. Your brain produces it by combining what each ear hears. The two tones need to be fairly low in pitch and close together for the effect to appear.

The popular claim is that listening to a beat at a given rate encourages your brainwaves to follow it, a process called entrainment. A 10 Hz beat, for example, is often sold as a way into a relaxed "alpha" state.

How bilateral music works

Bilateral music is simpler to describe. A soft tone, pulse or instrument moves steadily between your ears, usually over calm music or nature sounds. The idea comes from EMDR (Eye Movement Desensitisation and Reprocessing), a trauma therapy in which a client follows a side-to-side stimulus while recalling a memory.

We cover where it comes from and what the research shows in more detail in What Is Bilateral Music? The short version is that the research is mainly about EMDR as a full therapy, and there is little on bilateral music used on its own to relax.

Do binaural beats actually work?

The evidence is mixed. Binaural beats seem to have a modest effect on anxiety, attention, memory and pain in some studies, but the claim that they reliably change your brainwaves has weak support.

A 2019 meta-analysis by Garcia-Argibay and colleagues pooled 22 studies and found a medium overall effect on memory, attention, anxiety and pain perception. It also found better results when people listened before a task, rather than only during it, and when they listened for longer.

The brainwave explanation is shakier. A 2023 systematic review by Ingendoh and colleagues looked at 14 studies that measured brain activity. Five supported the entrainment idea, eight contradicted it and one was mixed. The authors described the evidence as inconsistent and called for more standardised research.

So binaural beats may help some people feel calmer or more focused, but it's not clear why, and the confident claims attached to specific frequencies go well beyond what's been shown.

Can you use binaural beats without headphones?

Not really. Binaural beats depend on each ear hearing only its own tone. Through speakers, both tones reach both ears and mix in the air, so you lose the binaural effect and hear an ordinary acoustic wobble instead.

Bilateral music is more flexible. It still needs the left and right channels kept separate, but that works through stereo speakers placed either side of you as well as through headphones. If you're using a phone, check that any mono audio setting is switched off, or the left-right movement disappears.

Which should you choose?

It depends on what you want from the listening.

• Choose bilateral music if you want something steady and grounding to settle into, you like having a gentle pattern to follow, or you want to listen through speakers in a room.

• Choose binaural beats if you're curious about using sound to support focus or relaxation, you're happy to wear headphones, and you're comfortable that the evidence is still developing. The meta-analysis above suggests listening before a task rather than only during it.

• Try both if you're unsure. Give each 10 to 20 minutes on different days and notice how you feel, rather than relying on the claims on the label.

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For teachers and practitioners, the headphone question often settles it. In a yoga class, a meditation group or a treatment room, most people won't be wearing headphones, so binaural beats lose their effect over the room's speakers. Bilateral music still works if the speakers are placed on either side of the space, which makes it the more practical choice for group sessions. Binaural beats suit one-to-one or at-home listening, where you can ask someone to put headphones on.

Whichever you use, keep the volume low. If either leaves you feeling dizzy, unsettled or sick, stop and switch to ordinary calm music. Neither is a substitute for treatment: if you're dealing with anxiety, trauma or poor sleep that won't shift, speak to your GP.

Hear bilateral music for yourself

If you'd like to try bilateral music, Reset is a good place to start. It has a steady, immersive left-right pulse designed for calm recalibration. For something more deeply relaxing, try Weightless. Both are part of Mishi's EMDR Inspired Bilateral Music collection, and tracks can be bought for personal listening or with a commercial licence for use in classes and client sessions.