[sdiy] frequency counter

[James Patchell]

An 11MHz crystal will work.  To get 440, you divide by 25,000.


I don't see any 11MHz oscillator modules, though....

At 09:22 PM 6/26/2004 -0400, mark verbos wrote:
>What crystal frequency did you use to get an A440? I have been tinking 
>about this over the last week and haven't seen any that seemed right for it.
>
>Mark
>
>Ian Fritz wrote:
>
>>
>>Sure.  When I set up a patch for recording I just zero-beat the VCOs in 
>>against my xtal-derived A440.  And since I have carefully taken out all 
>>the drift in my VCOs I never have to touch the tuning again (although I 
>>can't help checking once in a while, anyway).
>>
>>
>>

         -Jim
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