[sdiy] frequency counter

[mark verbos]

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).
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