Random from a Noise Osc?

infuzion · 5 Dec 2006

In the "Control" folder, there is a Poly Readout.

Problem is, there is no such thing a "random"; best you can hope for is a sequence of numbers that rarely repeat. Getting a random seed from something like the miliseconds from a computer, or a lava lamp would help the sequence from being predictable.

doug4350 · 5 Dec 2006

Hi Jobro,

infuzion is correct about random. There is no such thing as a true random number generator.

The Poly Readout component doesn't forward the value as shown in your example. A way around this would be to use the Poly to Mono component and feed it into the Mono to Float (if you're not already). I suspect the way you're feeding the stream bool to the green triggers is part of the problem too. I had problems with that before, but didn't find an elegant solution before giving up. Maybe someone else can be more enlightening, but from what I've picked up so far, my hunch is it can't be done that way.

Hope this helps... Aloha, Doug

jobro · 5 Dec 2006

Well i think it is rather strange that SM lacks such thing as a randomizer. I've tried to use the poly to mono and mono to float to get the sound to obtain random values.

sambean · 5 Dec 2006

If you pop this in a code module it should work

streamin seed; streamout out; float sign; float rand;

stage(0) {

// //Seed has to be between 0 and 1 //Fop some reason (seed % 1) //doesn't seem to work.. //

rand = seed + 0.000001; // stops stable values eg 0.5 rand = min(rand , 0.9999); // 1 and 0 are both stable too.. rand = max(rand , 0.0001);

}

stage(1) {

// // Optimised pseudo random number // rand = ( rand * 3 ) % 1 //

rand = rand*3; rand = rand - (rand>2)&1; rand = rand - (rand>1)&1;

out = rand*2 - 1;

}

Sam

unkargherth · 5 Dec 2006

I'm also working on a pseudo-random generator in ASM, based on integer overflowing. My skills in ASM are, to be generous, a bit limited but iexpect finish it somewhere in near future

sunsynth · 5 Dec 2006

Hi jobro,

i found a randomizer in skores "audiooak_module_pack_1_3_1" where he gives credits 2 infusion and NothanUmber...

I never tried it but maybe usefull 😉

SUNsynth

infuzion · 6 Dec 2006

sunsynth wrote: i found a randomizer in skores "audiooak_module_pack_1_3_1" where he gives credits 2 infusion and NothanUmber...

I took NUmber's, & tried to make it more "random". But it stll just calculates a series of numbers, but if you have a bunch of different things triggering it, then it will seem more random. But if you ship a VST with it (or any randomizer), you'll get the exact same numbers when you turn it on.

What is really needed is a way to randomly seed the randomizer.

oddson · 6 Dec 2006

What's really needed is a green random primitive. It would just be a wrapper for the standard Windows random function.

This should be a no-brainer for the developers but everytime it comes up it's ignored. 🙁

unkargherth · 7 Dec 2006

Well, could be not so simple:

a) Why only a green float version ? b) if we want a stream ( mono/poly) version, calls to standard rand() could be two slow c) If we are working on a SSE model, could be nopn trivial to do calls to winapi ?

Anyway, if somebody don't mind ho have a random gen running at sample rate, take a look at this.

Really it's not so random. Cycle repeats every 16384 outs, but could eb enoght fro some applications, (and can be changed in Code)

Comments and suggestions welcomed

Once we opened the topic. Any ideas for alternative randomness/noise sources inside of current SM ?

infuzion · 7 Dec 2006

unkargherth wrote: Any ideas for alternative randomness/noise sources inside of current SM ?

Well, you can help add more caos if you somehow have a 2nd randomizer connected to the 1st that is triggered at different times. & they would change each other on occation, thus preventing fully repeatable patterns.

I have a few other top-secret ideas also 😈