Audio & Music tool
Bilateral Audio & 8D Sound Maker
Add a smooth ear-to-ear sweep or alternating left-right movement to an audio track. Adjust speed and depth, preview the effect and create a stereo WAV privately in your browser.
Move your sound
Add a smooth stereo sweep or clear left-right alternation to your own audio. Headphones make stereo movement easiest to hear.
Try a demo track
Choose one of our tracks, then select and preview any effect below.
Choose your own audio
MP3, WAV, M4A and other browser-supported audio up to 80 MB and eight minutes. Your file stays on this device.
Processed privately in your browser — your entries are not uploaded.
Good to know
How this tool works
Choose an audio track, select a smooth sweep or alternating left-right movement, then adjust its speed, stereo depth and starting ear. Compare the effect with the original before creating and downloading a stereo WAV. Use headphones at a comfortable volume.
Frequently asked questions
What is Bilateral Audio & 8D Sound Maker useful for?
Move sound smoothly between the ears or alternate it from left to right. Listen through the finished file at a comfortable volume and keep the unedited original.
Is my information stored?
This tool works in your browser. The information you enter is not sent to us or saved in an account by this tool.
Does my audio leave this device?
No. Your browser decodes, previews and renders the audio locally. The finished WAV is created in this tab and is not uploaded to our server.
What settings should I begin with?
The default smooth eight-second cycle and 85% stereo depth create a clear but gradual ear-to-ear movement. Use a longer cycle or lower depth for a gentler effect; use Left-right pulse for distinct alternation.
Does this treat anxiety or another condition?
No medical benefit is promised. Some listeners find moving audio relaxing or immersive, but this creative audio effect is not diagnosis, treatment or a substitute for professional care. Listen at a comfortable volume and stop if you feel uncomfortable.
Can I use the output anywhere?
You remain responsible for permission to edit, distribute or publish the source audio. WAV files are large and widely editable; convert the checked result with our Audio Cutter & Effects tool if you also need another format.