[sdiy] VERY cool/bizarre: Buchla noise

[Ken Stone]

You only need ask Harry about the infamous "chuga-chuga" chip. The MM5837 is
about as random as counting to 100 by 1's.

Ken


>OK, check this out:
>
>Something tells me the signal coming out of the MM5837 ain't true random,
>right?  I say this because:
>
>I made a clone of the fluctuating voltage section of the Source of
>Uncertainty.  As far as the parts, it to the letter of the law - including
>the digital noise chip mentioned above.
>
>OK, so...in order to create random pulses I ran the output of the noise outs
>of that module into my Event Timer, which is nothing more than a comparator
>with a variable reference in the form of a pot. So depending on where that
>threshold is set you'll get (what I would expect) either a lot random pulses
>-or few, right?
>
>I mean, this makes sense, right?
>
>Well - I'm getting repeating patterns out of it and I'm not talking long
>phrases that I have to concentrate on to determine they repeat.  these are
>short repeating phrases.  For instance (and excuse my ascii), I've presently
>got the -3 dB noise patched into the ET and I'm getting:
>
>where: 
>
>E is an eight note
>
>e is an eight rest
>
>T is a sixteenth triplet
>
>S is a sixteenth note
>
>s is a sixteenth rest
>
>and a period after each is dotted
>
>eTEE over and over again.
>
>coming from the 'flat' out I'm getting:
>
>E.eSS over and over again
>
>out of the +3 dB out I'm getting:
>
>SSESS 
>
>
>
>...anyone care to 'splain this?
>
>???
>
>
>- P
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_______________________________________________________________________
Ken Stone   sasami at hotkey.net.au or sasami at cgs.synth.net
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
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