[sdiy] Truly ... noise

[john mahoney]

Re: Truly white noise

Scott Gravehorst wrote:
> Why isn't a good LFSR or good
> diode noise source sufficient?  Either one can be built from dirt cheap
parts,
> the LFSR type is easily in the $2.00 or less range.  And the noise
spectrum can
> be [limited] and customized with filters to get the sound you want.

The handy thing about digital noise sources (LFSR) is that parts don't have
to be hand selected; that's one reason why manufacturers would prefer them.
Even as a mere DIYer, I would just as soon avoid the selection process. :-)

On the other hand, Tim Daugard wrote, "I have been using 6.3 V zeners as my
noise source. They are inexpensive and every one has put out a good level of
noise." That's good to know! Maybe the need for selection is overstated.
(Peter G just added a similar comment about noise diodes.)

Peter would agree with me that low-bitcount LFSR noise (MM5837 with 17 bits,
for example) into a Sample and Hold is a good CV source at times *because*
of its repetitive nature.

~
Re: Truly red noise

Gentlemen, behave yourselves! Truly, "Red Noise" was a Bill Nelson band. ;-)

--
john (big Bill Nelson fan)