[sdiy] Black Magic oscillator cans
Ingo Debus
debus at cityweb.de
Mon Jul 21 15:19:49 CEST 2003
Tim Ressel wrote:
>>BTW, I can't figure out
>>how you derived 2,00024 MHz.
>
>
> Ask Mostek. That is the frequency for the MK50240 TOG
> to make A=440. Its probably from a set of divisors
> they came up with to meet a certain error spec, and
> that's the frequency that works with those divisors.
>
> By the by: 50240 divisors:
> C 478
> C# 451
> D 426
> D# 402
> E 379
> F 358
> F# 338
> G 319
> G# 301
> A 284
> A# 268
> B 253
> C' 239
The frequency error introduced by these divisors is way way bigger
than that caused by using a 2 MHz clock instead of 2.00024 MHz.
Am I the only one who noticed this? Or did I miss the point completely?
Ingo
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