[sdiy] Digital noise sources

[Tom Arnold]

On Fri, Jun 13, 2008 at 06:53:27PM +0200, Louis van Dompselaar wrote:
> I always thought that the reset circuit would keep the input 0 or 1 for
> a random-ish length.

Doh!  Yes of course, the reset circuits job is to do exactly what I was
thinking of.  I guess its highly probable that the circuit would load the
same amount of startup data at powerup and the stream would be predictable
which wouldn't hopefully be audibly noticable.

I guess the only way to get "more random" would be to use something that
started up in an unpredictable state like a BBDs, but even that would be
predictable in that you'd be depending on cap leakage, or maybe using a
noise transistor/diode with a tight filter to occasionally pop a bit into
the the digital register.

Ah well, pure random doesn't seem to matter in this case anyway and thats
what I was pondering.

Thanks.

-- 
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 - Tom Arnold       -  Free Synth DIY webspace http://www.sdiy.org 
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