http://hbar.phys.msu.ru/gorm/a... They could have used small round stones on hard surfaces, like shown on the page.

Words from Professionals in the music recording industry, is that 24 bit do make a difference in the dept field, dynamics. differnce between 16 sound levels and 24 is a 50% better. But 96 hz is no use as only dogs, cats, rats and mouse's ca hear there. It is just a waste of space.