[sdiy] Prom generating TOS like MK50240 bits..

[nvawter at media.mit.edu]

Quoting Tom Wiltshire <tom at electricdruid.net>:

> Thinking about it more, though, it's the least common *multiple*  
> which is crucial, not the factors.
> Multiply all these, Least Common Multiple = 1.4163158499841E+22
>
> Still very big, but we're under a yottabyte this time!


Ah yes!  Glad you reminded me it's least common multiple...  that
reduces my implementation to:
32*27*25*7*17*19*23 = 1123264800
l(.)/l(2)
30.06505092474673512219, e.g. 2^30.065

So, that's just a little over 1 Gig addresses!

Shockingly enough, you can by 1Gb flash mems for ~$6 now.
Since you'd need 11-12 of them (one for each note), that's about $66....
or, just use a single 16Gb flash chip for $11.73!!!

If you were to clock it at e.g. 14080 kHz, the /32 output would result  
in A440 and the chip would only repeat every 19 hours!


With some interesting features... for instance, you could scramble,  
randomize, wow, flutter, and otherwise perturb the outrageously long  
word inside the memory to get variations and reduce phase-locking...


> T.
>
> On 18 Apr 2012, at 20:45, Jean-Pierre Desrochers wrote:
>
>>
>> Suppose you read all the 12 generated notes from
>> a MK50240 TOS with a signal analizer, after a while is there a
>> 'sequence' in the 12 generated square waves that 'wraps around' ?
>> I mean all the tones repeat all together a pattern
>> that could be burned into a  PROM then scanned with
>> a binary counter that would wrap at a precise address
>> to make all the tones seam running continuously.. ?
>> JP
>>
>>
>>
>>
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
>