[sdiy] mm5837 are all over the place!

[Karl Dalen]

The MM5837 is really the pssh rotten in hell , psssh "catchunka" 
and then rotten in hell of IC's!(Harry is right on that).

Then you dont need long shift registers to achieve
the same efect,Do this:

1: Take a regular zener/transistor noise source, amplify
it and make it fairly flat in the frequency band.

2: Then run this noise trough a simple S/H cell.
(a simple single 4066 swich and a OPamp buffer)
now clock "diss" with a VCO.(PW of square shall be small).

3:And tra-la-la!!!Here are the same effect!

The benefit with shift registers are the flat
frequency responce and amplitude wich independent
of temperature changes, also RFI,EMC problems are
reduced conciderably compare with the high gain 
zener/transistor thing.

Besides anyone of age should remeber
this sound of old pinnball games!!

KD 

> I really like what happens to the sound of those shift-register noise 
> generators when you sweep the clock frequency.  It has a very pleasant,
> swirly 
> phasing/flanging/filtersweep-like quality - but also really nothing like
> phasing, 
> flanging, or filter sweeping.  I'm pretty sure that John Blacet's Dark
> Star 
> Chaos module lets you do this, and provides a modulation input for this
> purpose 
> (it uses the old TI SN76477 sound effect IC).  I tried this out when I
> was 
> messing around with the TI IC, and was shocked at how cool it sounded,
> although the 
> effective sweep range was not as wide as I would have preferred (using
> the 
> chips internal noise clock).  Did you ever experiment with sweeping the
> clock 
> frequency on your own shift register noise generator?
> 
> Mike B. 

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