Okay, so you drop the 20-ton weight (a la "Monty Python") and no doubt it generates some low frequency sounds on impact. What I'm really wondering is what they capture it with. Think about the dynamic range involved -- from dead silence to who knows how many decibels. And the frequency range involved -- the whole audio spectrum down to seriously subsonic. Even if you have the microphone to handle it, what do you record it on?

Or is this easier than it sounds (no pun intended)?

Music is the best -- FZ