On 9/18/06, selfoscillate < synaptic_music@... > wrote:

> i think it is quite normal on vco's that the sine is not pure.
> from a musical point of view this must not be a disadvantage,
> but if you are doing fm it certainly is.

Is it really that much of an advantage I've never had the possibility
to do linear FM on an analog "hi-end"-VCO (by which I mean a VCO with
an as-pure-as-possible sine wave...), so I cannot tell how the
difference actually sounds, but from my understanding, by modulating
one VCO with the sinewave of another, you actually modulate the
frequency of the core-waveform of the VCO (triangle or saw), which is
then sent through the converter. So you don't get "pure FM" anyway...

-Michael