Stonehenge may have been the place to rock out at trippy Neolithic concerts of sorts — and that may explain why the mysterious circle of stones was erected.

A U.S. researcher suggests that the architects of Stonehenge were inspired by magical “auditory illusions” the stones could produce, according to a Live Science report.

Steven Waller, a researcher who specializes in the sound properties of ancient sites, is challenging common Stonehenge theories that the site was intended for spiritual worship and ceremonial burials.”