Is There a Penrose Process?

In 19 69, theoretical physicist roger penrose proposed a process called the penrose process through which an advanced space faring society could extract energy from a black hole. A problem with this kind of stuff is that there's no way to figure out if they're right or not. So we had to figure out ways on earth to replicate theories like this. And what they found was that as the speed of the spinning disk increased, the amplitude of the sound passing through it got lower and lower until it matched the spin of the disk. At which point  the disk went into negative mode and became a negative version of itself. Ho yao sounds exactly as expected at same time in different