[sdiy] VERY cool/bizarre: Buchla noise

[Harry Bissell Jr]

I still don't agree... It is NOT truly random
as it does not have an infinite number of states...
it has only as many as the length of the register.

Think of a register with four bits... the
lowest frequency it can generate would be
1111000011110000  etc...
the highest is
1010101010101010

The all ones (or zeros depending on the logic) state
will latch the device and it must be avoided or
recovered from.

It approaches 'random' and over the short term
(compared to other methods) is a good way to generate
noise - as long as you don't recognise that it
IS NOT RANDOM !!!

(but it is good enough for rock 'n roll :^)

H^) harry



--- Rainer Buchty <rainer at buchty.net> wrote:

> >I think you've nailed it right there! It is not
> random.
> 
> *No* PRNG (i.e. noise generated by a feed-back shift
> register) is true
> random but shows a periodic behavior. That's why you
> should use at least
> 22, 23 Bits so that pattern repeat takes place in
> the domain of a few
> minutes rather than seconds.
> 
> Rainer
> 
>