[PD] help_random/seed
Martin Peach
martin.peach at sympatico.ca
Sun Jul 5 23:36:42 CEST 2009
Andrew Faraday wrote:
> To be honest an oscillator in that setting might do the job just as
> well, just so long as the figure isn't requested with the same
> regularity as the oscillation.
>
Yes, it's a subjective thing. The attached patch makes a sequence of 1s
and 0s. You need to pack them into 16s to get the usual 0-65535 range.
The output will be more random than the input [noise~], but it probably
sounds exactly the same if you play it back at the audio rate.
Martin
> > Date: Sun, 5 Jul 2009 12:44:05 -0400
> > From: martin.peach at sympatico.ca
> > To: cemthemuteguney at yahoo.com
> > CC: pd-list at iem.at
> > 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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