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[maxmsp] Re: someone explain the drunk object please

Peter Castine pcastine at gmx.net
Tue Apr 1 14:54:59 MDT 2008


The drunk walk model is a stochastic model nominally following the path of a drunk who has just left the bar. He will take a step to the left or to the right at random (not knowing whence he has come nor to where he wishes to go). After the first step, his next step is chosen at random, either to the left or right. And so on. In the mathematical model the drunk never sobers up (whereas in real life he will be found at dawn by the police who will either take him home or put him in the clink). And interesting phenomenon of the model is that the drunk keeps on returning to his starting place.

The model is a form of Brownian notion (check that out on wikipedia for more gory details).

What to use it for? I don't because there's something called Litter Power that I generally use. Drunk is a kind of semi-controlled randomness, technically a species of 1/f^2 noise, and it sounds different from white randomness or pink randomness and other random models.  

Litter Power has some examples that demonstrate the difference in sound of different "colored" random number sources (white, pink, brown, black). You might want to give them a listen. URL below.

Best -- Peter
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Peter Castine
Litter Power: <http://www.bek.no/~pcastine/Litter/>
iCE Tools: <http://www.dspaudio.com/software/ice/ice_overview.php>



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