[sdiy] Digital Noise, FYI

[Magnus Danielson]

On 02/16/2011 02:38 PM, Harry Bissell wrote:
> hmmm...
>
> When I got my ProphetV, it used the dreaded (and feared) MM5837 noise source.  I tried to make an exact
> replacement with analog techniques, but could not get the 0>15V "all or nothing" voltage swing. I suppose
> with my superior skills these days, a comparator would have done the trick...
>
> A CD4006 based solution was exactly what the doctor ordered, it did not mess up the factory presets in the least, but
> removing the MM5837 did eliminate the (your choice)<ticking time-bomb>  <roaring freight train>  <chinese water torture>
> from the sound...

Oh, so you can't get those autentic sounds anymore? >:-)

> The digital techniques have their place. I don't really care about 'random'... a repeat every few hours or so doesn't
> get too much of my attention :^)

The main problem they had was that they where too short. Bad 
implementation, but not necesserilly a bad solution as such.

Cheers,
Magnus