simple LFO question

[danial stocks]

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>
>>I still think everyone has missed the boat on this issue.
>>
>>The problem is not the shape of the LFO; it's the response of the delay
>>line. We all know that frequency-based devices like VCOs and VCFs need to
>>be have an exponential response to CV in order to sound "right", simply
>>because of the way our brains interpret signals. It stands to reason that 
>>a
>>flanger (for example), being a complex filter, should have an exponential
>>response to control voltages as well. Why don't the designers of these
>>things put exponential front ends on the clock VCO's, instead of playing
>>games with the CV generators?
>
>I've been wondering the same thing for years. Any time-delay-based
>effect would benefit. Anybody?

I designed a vc lfo for driving delaylines/ phaser etc, which uses a 
reciprocal vtg/freq ratio. ie the PERIOD is proportional to the voltage.. 
this means that if it is clocking an analog delay line, then the delay time 
is prop to control vtg.. it's quite simple, opamp, comp, fet... but as I 
havent been able to find any analog delay chips I havent put it to use yet..
Cheers,
Dan
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