If you have an iPhone 7 or later, iOS 15, and a pair of AirPods Pro or AirPods Max, you can take advantage of dynamic head tracking audio.
Apple Spatial Audio Explained!
With iOS 15 now fully released on Tuesday, you can install it now and take advantage of all the new features, including spatial audio via Dolby Atmos. This gives you a sort of simulated surround sound that makes it sound like different instruments and vocals are coming from all around you.
In the case of dynamic head tracking, it even gives these audio elements a fixed point in virtual space that changes dynamically. In other words, as you turn your head, the audio orientation of the instruments and vocals appears to change. For example, if it sounds like there are drums to your right and you turn your head in that direction, it sounds like the drums are in front of you.
The head tracking feature should be enabled by default once spatial audio is enabled. Simply head to your device’s Bluetooth settings to toggle it on or off. There’s also a Demonstration option (in Settings) that you can select if you’d like to hear what it sounds like before changing any settings. Once enabled, you can adjust the volume or toggle spatial audio on and off directly from the Control Center.