Re: Electronic Organ

Rickydou wrote:
Thank you very much for helping me. You are right...I do not want to
re-invent the wheel!

I also found an IC that is specialized for this application: MOSTEK
MK50240 Top-Octave Frequency Generator. I just need to find a supplier
for this...

Thanks!

Eric


Rich Grise wrote:

On Fri, 07 Jul 2006 10:43:15 +0000, anno4000 wrote:


Rich Grise <richgrise@xxxxxxxxxxx> wrote in sci.electronics.design:

[...]


Strictly speaking, the "well-tempered" scale is one that's not an exact
chromatic octave in any key, but "close enough" in _every_ key to get away
with it.

Err... the octaves in a well-tempred scale *are* exact, it's the other
intervals that are approximations.


OK, I misspoke. The _octave_ is a perfect octave, as you say, and it's the
other notes - maybe I should have said, "chromatic scale" instead of
"octave".

Thanks,
Rich


The MK50240 is outrageously and horrendously obsolete.

Check the Ensoniq chips instead.

But the magic numbers appear in my CMOS and TTL cookbooks.
There is only ONE eight bit sequence that gets all of the notes right.





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