[sdiy] 440hz revisted

[Tom Arnold]

>       455*525*30
> f   = ---------- = 3579545,454545... Hz
>  SC    2 * 1.001
> 
> f  = 8192 * 440 = 3604480 Hz
>  0
> 
> f  - f   = 24934,545454... Hz
>  0    SC
> 
> That would be about 3 Hz below and you need to pull some 20k before getting it
> even risking sharp.

Forgetting power of 2 and unstead using circuit complexity to use a cheap
crystal :
8134 * 440 = 3578960 or a 500hz pull from 3579545, should be able to pull
2khz easily ( 3+ if I put two crystals in parallel, look online for the
SuperVXO ) so its well within range although it would be nice to find
something that'd pull to  3.604 or 7.208 so I'm still looking...

> A 4,4 MHz oscillator divided by 625 followed by a 7-stage binary counter would
> supply A1, A2, A3, A4, A5, A6, A7, A8. Simple enought.

Would it be overkill to just use a top octave divider and a 1mhz crystal?
:-)

-- 
 ------------------------------------------------------------------------
 - Tom Arnold -       When I was small, I was in love,                  - 
 - Sysabend   -       In love with everything.                          -
 - CareTaker  -       And now there's only you...                       - 
 --------------         -- Thomas Dolby, "Cloudburst At Shingle Street" -