For an open source alternative, try Bucklyspring: it runs on linux, mac and windows. All Klack's marketing lingo even applies as well: High fidelity sound, Immersive spatial audio, Instant type feedback, Up/down keystrokes.
Thanks for sharing this project. Love the sounds [1]. Unfortunately, the github states the windows version is broken (haven't verified myself). Also, just personal taste, I can see myself getting tied of the bucklespring sound. Klack having different switch sounds seems worth the price alone.
The erlang version will allow it to be played through the speakers of any or all devices in the cluster. I'm not sure we're ready for this amount of power.
The term is, the tech isn't. Apple does this with lots of things, like calling OLED displays 'Super Retina'; it both is and isn't true that only Apple products have super retina displays.
I think the distinguishing feature of displays branded “Super Retina” is the high pixel density (around 460 ppi). They have lower density OLED displays that they just call “Retina”.
That the term essentially didn't exist (1/100 "interest") until Apple rolled it out in Sep 2020 (with some press the summer before).
The general idea of a 3D effect on headphones has been around for decades, often called "3D audio" or similar [1], but I never heard the term "spatial audio" until Apple marketed it.
Debian/ubuntu users: sudo apt install bucklespring all others: https://github.com/zevv/bucklespring