[sdiy] Syncable digital noise source.

[Michael Zacherl]

On Jul 1, 2008, at 2:38 PM, Loscha wrote:

> I think what you're after is called in the computer programmed world
> as "Seeded Random".
> You supply a complex algorithm with a startup condition.
> In ye olde basic days you'd do something like RAND(0)=TIMER or what
> have you to seed it with the milliseconds since start up of computer.

you know, that's the very first time since back then that I start to  
like this ... well .. "feature" -  that one has to initiate a random  
generator ;-)


> Maybe an 8-way DIP switch and some complex logic would do the trick?
>
> -ErJ
>
> On Tue, Jul 1, 2008 at 10:21 PM, Michael Zacherl
> <sdiy-mz01 at blauwurf.info> wrote:
>>
>> On Jul 1, 2008, at 1:31 AM, Tom Wiltshire wrote:
>>
>>> Anyway, since then, I've tried putting a reset input on my PIC noise
>>> source. Then I fed a squarewave from an SH101 into the reset  
>>> input. The
>>> result was not worth the limited effort, in my opinion. Whilst the
>>> formant-shaping produces noise with certain "flavours", it didn't  
>>> produce
>>> much that sounded good to my ears. Obviously you can start the  
>>> LFSR in many
>>> different places and get many different flavours, so perhaps I  
>>> didn't
>>> explore enough. I wasn't encouraged to by the results I got. The  
>>> sound isn't
>>> pitched enough to be really useful, and as unpitched noise goes,  
>>> pure white
>>> or pink have a smoother quality whilst the synced noise often  
>>> sounded
>>> "spattery" and uneven.
>>
>> Hi Tom,
>>
>>  how about in the LF-range, e.g. when using an S&H and syncing at  
>> very slow
>> speeds?
>>
>> Would it be possible to sort of loop a random pattern?
>>
>>  :-) Michael.
>>
>
> -- 
> www.loscha.com
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