Pitch -> CV conversion

[Tony Clark]

> Compare that to a non-PLL system, one that just times the zero
> crossings.  It would output a single cycle glitch CV pulse and the
> rest of the time it would be accurate.  If you didn't apply
> portamento, that CV pulse would cause a single cycle of noise (the VCO
> running a much higher pitch) in a VCO.  Not bad.

   Would a better way be to have a fairly fast counter running that keeps 
track of the zero crossing times and then have some processor generating 
CV voltages in relation to the final value before the counter resets?  In 
that case it'd be generating the correct CV voltage but lagged by only 
half the input waveform's cycle.  Right?  I'd imagine that'd work fine 
for higher frequencies but low frequencies might have a noticeable lag?

   Tony 

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I can't drive (my Moog) 55!
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Tony Clark -- clark at andrews.edu 
http://www.andrews.edu/~clark
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