[sdiy] Vote for your favorite noise source

[Magnus Danielson]

From: "Happy Harry" <paia2720 at hotmail.com>
Subject: Re: [sdiy] Vote for your favorite noise source
Date: Mon, 13 May 2002 14:43:54 +0000

> Its hard to define up without some reference standard.
> 
> To define the "best" noise source we need a reference...
> a standard by which all others are judged...
> 
> The WORST noise source in the world is the MM5837 (National Semi)
> 
> as used in some Prophet V rev3 and some Korg MonoPoly models...
> 
> tic tic tic....

Indeed - problem: To short shift-register -> To short loop-time.
Each added D-flip-flopp doubles length (you have to select feedback
terms correctly naturally).

The 4006 is a 18-stage shift register with multiple taps
available. Two or three of those (reaching up for 36 or 54 steps) and
a 4070 (quad XOR) correctly wired and you have a wealth of noise. Add
power and a suitably high clock. It naturally needs filtering, but
that is another issue.

Cheers,
Magnus