On iOS with AirPods there’s spatial audio which does this.

The song is playing in stereo. Depending on the device you're listening to you can change it to play in mono.

On a computer there's an option called "balance" you can change the distribution of the sound so all of it will come out of the side that you're not laying on. Some phones may have this option too, I don't think android does.

Try to look for earphones with 3D head tracking. They work better for horizontal movement, but they might also help if you are lying down.

Some newer headphones, like the Samsung Galaxy Buds 4 Pro that I just got, have 360 audio with head tracking. So, if you turn that on while you're upright, then lay down, the audio should compensate for your movement.

Just wear the headphones the same way you would if you were upright. 🤨

Or close your eyes. They are still in front of you. But what is in front of you is the ceiling.

Many years ago soundcard drivers used to include things that could do this. Something like a "virtual surround sound" where you could place the speakers in a simulated spot. I don't know if anyone has continued doing that on that front, but it can absolutely be done in a game engine. So if you're willing to learn a little game development you could theoretically throw something together that could place virtual speakers in a 3d space.

Yeah, it's a thing.

Was always a gimmicky part of speaker software back in the day.

Like, a page in setting was a picture of a generic room and you can drag and drop an icon for the picture to change how 3d sound was displayed.

So you could likely find something like that and co-opt it for headphones.

Search for something like "3d audio setup" or "positioning software".

That being said, this isn't a problem with how you're processing sound. It's more likely an inner ear thing, but it's impossible to say if it's a "problem" or just weird variation. So anything you do with the headphones is just going to compensate for it, not actually solve it.

It's probably also weird watching TV or a screen from an angle either, fixing the inner ear thing would likely solve a lot of stuff for you, especially if you consider yourself clumsy

What if you rotate the head phones so the band is at the top?

Fascinating and funny problem, great thread.