[sdiy] LFSR digital noise source

[Harald]

For 32 bit digital noise source have a look here: 
https://www.haraldswerk.de/Vocoder/Noise/Vocoder_Noise.html This might 
give you a start. If you need the Gerber files contact me via my site. 
Analog noise here: 
https://www.haraldswerk.de/NGF_E/NGF_E_Noise/NGF_E_Noise.html

Am 11.11.19 um 01:32 schrieb bbob:
> sometimes for the sound directly (crunchy/brittle), but more often slowing
> the clock and then using it as a modulation source
> 
> On Sun, Nov 10, 2019 at 7:11 PM ColinMuirDorward <colindorward at gmail.com>
> wrote:
> 
>> Hope this isn't too off topic, but I've often wondered when/why you'd
>> choose a digital noise source over an analog one. It is simply for the
>> acoustic flavour?
>>
>> On Sun, Nov 10, 2019, 4:05 PM Ben Stuyts, <ben at stuyts.nl> wrote:
>>
>>> That link points to the mil-spec version which is $15 each at 100 pcs. :-D
>>>
>>> Ben
>>>
>>>> On 11 Nov 2019, at 00:43, rsdio at audiobanshee.com wrote:
>>>>
>>>> It’s not really a complex shift register. All you really need is a set
>>> of Exclusive OR gates and a simple shift register of the desired length. If
>>> you can’t find a shift register that is long enough for your needs, you can
>>> simply cascade shorter shift registers. The only disadvantage of a discrete
>>> logic design is size. You can certainly tweak the taps if you have the
>>> shift registers and XOR gates as separate components.
>>>>
>>>> Note that Texas Instruments lists their CD4006 product as Active.
>>>>
>>>> http://www.ti.com/product/CD4006B-MIL
>>>>
>>>> Of course, this can be simulated in software, but that seems like
>>> serious overkill given how simple the basic gates are. I enjoy using
>>> processors for processing, but it’s way more fun to use discrete logic
>>> gates for pure logic functions.
>>>>
>>>> No matter which option you choose, I think that the signal conditioning
>>> from raw digital to analog would be a critical part of the design
>>> considerations.
>>>>
>>>> Brian
>>>>
>>>>
>>>>> On Nov 10, 2019, at 6:41 AM, bbob <fluxmonk at gmail.com> wrote:
>>>>> anybody know of a digital noise circuit (similar to th ETI/Ken Stone
>>> design, http://www.synthpanel.com/modules/cgs31v10_digital_noise.html)
>>> that does not use the out-of-production CD4006?  Seems like you should be
>>> able to cobble together a complex shift register like that out of other
>>> still-available chips, but i'm not savvy enough on digital logic to do it
>>> myself.
>>>>>
>>>>> b
>>>>
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