pseudo-random shift generator

[Ken Stone]

Actually, using multiples of such noise sources linked at the logic level
produces some pretty wild sound effects, much more than just noise. i forget
how I did it exactly, but I remember I had 3 * 4046 VCOs, a 4030 Exor and a
couple of shift register chips. I have seen the circuit for a complex sound
generator lurking somewhere on the web that you might like to hunt out, I
forget the URL too.

What a memory...

Ken

>>A minor comment about the digital noise source - it is generated by a
>>pseudo-random shift generator. The problem is that the period repeats
>>every few seconds - this is 99% of the time not a problem but in cases
>>where you have long periods of nothing but noise, the repetative nature
>>is very obvoius.  It is possible to build longer length PSR-SG's but the
>>chip count gets a bit much compared to the traditional back-biased
>>analog transistor unit.
>>
>>David Halliday
>
>I'm interested in these circuits a great deal myself, perhaps you could
>detail the circuit you're using (text description or gif file ?!) ... I was
>wondering and suspect that you could generate longer sequences by cross
>coupling two such circuits, as in a dual feedback arrangement ... by this I
>mean two complete random generator circuits except the outputs are fed back
>to the inputs from there or something (possibly further nored or exored
>using intermediate bits) ... doubling the circuit wouldn't be objectionable
>complexity-wise I wouldn't think.
>
>jc
>
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                Ken Stone  sasami at blaze.net.au
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