Exceeds theoretical limits:-http://physicsworld.com/cws/article/news/2013/jan/31/human-hearing-is-highly-nonlinear-"In signal processing, there are a very large number of time...frequency distributions that have been proposed in order to analyse these signals," says Magnasco. "The question is, since there are very many different ways in which you can do this and only the highly nonlinear ways can offer performance comparable to what humans do, which one of these is in the same family as what the brain does?" -Mike Lewicki, a computational neuroscientist at Case Western Reserve University in Ohio, says the research is "a nice demonstration that our perceptual system is doing complex things ... which, of course, people have always known ... but this is a nice quantitative demonstration by which, even at the most basic level, using the most straightforward stimuli, you can demonstrate that the auditory system is doing something quite remarkable". -Another version of the report:-http://www.newscientist.com/article/dn23143-musical-brains-smash-audio-algorithm-limits.html