it's nice to observe that an extensive/productive conversation has come about
from my question in regards to "random" systems, and it's quite
informative to follow, and frankly a bit far from my current reach
of knowledge, but what is important for me at the moment
is to learn the general difference between random & pseudo-random & the various
applications that is possible with random systems via the several examples
given.
will try to build from there...
thanks again folks, :)
Cem Güney
myspace. . lastfm. . tumblr. . cronica
________________________________
From: Martin Peach <martin.pe...@sympatico.ca>
To: cem guney <cemthemutegu...@yahoo.com>
Cc: pd list <pd-list@iem.at>
Sent: Sunday, July 5, 2009 7:44:05 PM
Subject: Re: [PD] help_random/seed
cem guney wrote:
> hi,
> thanks much for your response!
> also in regards to your explanation,
> "It would be nice if the random source could be independently specified for
>all the pd objects that use random numbers,
> since the count of unreachable combinations when using the standard
> deterministic chaos generators is infinite"
> any application examples as to why it would be nice if the random source
>could be independently specified?
>
Well I think it's mainly a philosophical thing about the meaning of 'random',
but probably there are sequence generators for music that sound different with
'truly' random vs pseudo-random numbers. Sometimes you may want a repeating
chaotic sequence, sometimes a completely random one.
For cryptography, as in a one-time pad, pseudo-random is relatively easy to
crack. There are at most 65536 different sequences with typical pseudo-random
generators, but that's not any inherent limitation of pseudo-random, just the
particular implementation that's often used.
Also with games like rolling dice or shuffling cards, you probably want it to
be completely unpredictable, or regular players will begin to recognize
patterns.
Pseudo-random white noise playing at audio rate will actually be a repeating
waveform several minutes or hours long. It's up to you if that matters or not.
Martin
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