[RE: VCDO]

[Chris Crosskey]

HI Folks, 
Gene Z wrote...

>
>    I have another idea, and there is probably somebody that can implement it.  Use
>a simple voltage controlled high frequency oscillator and divide it down by the
>number of samples you want to have per waveform, say 64.  Use a phase-locked loop to
>lock the 64 times oscillator to the audio frequency you want to create.  The audio
>frequency is taken from an audio exponential front-end VCO.  The result will have
>the same accuracy and stability of the your audio VCO.  The audio VCO is not
>intended to generate tones, just a square wave for phase locking and can be
>consequently as simple as possible.  Any comments?
>

Sorry Gene, we tried that....there's a fair am ount of audible distortion 
caused by the PLL slewing before it locks on each note, if you set it slow 
then it always <glides> into the note, if you set it fast then it 
overshoots and rebounds....it don't sound good....

chrisc