Q: What exactly makes audio "8D" or "3D"?
A: 8D audio is heavily a viral internet gimmick, but it genuinely sounds physically incredible. It's not actually fully 8-dimensional space (obviously).
Basically, a producer takes a normal stereo song. They apply specific mathematical psychoacoustic filters (called HRTFs) that trick your human brain into believing the sound is actually physically orbiting closely around your skull.
Q: Do I furiously need expensive software to uniquely make 8D songs?
A: Nope. Upload a standard MP3. The algorithm dynamically pans the audio from left to right, subtly manipulating the EQ to simulate the source moving intensely behind your head.
It absolutely requires headphones, though. If you play an 8D track on standard laptop speakers, it basically just sounds like the volume is aggressively wildly fluctuating up and down.