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Re: Quadrature Oscillator

2004-06-08 by Mattias Rickardsson

From: "John Loffink" <jloffink@...>
>
>> Since the linear FM inputs are ac coupled, that's all that matters.
>> Any oscillator patched into them will have the offset removed.
>
> True, but ideally you want vibrato at the exponential FM input
> so the pitch range is balanced on both high and low cycles,
> though I suppose for mild vibratos it may not matter.

If I remember correctly from a discussion on SAS (Analogue Heaven's
Swedish sister) some years ago, the implementation of linear FM in a VCO
core can be done in more than one way, one of which resulting in a "scaled
linear FM" where the scale factor of the linear FM depends of the
frequency set by the exponential CV inputs.

Maybe this mechanism could be used to keep the depth of the vibrato
between notes, but still have the vibrato in a non-offsetting linear FM
fashion? :-)


/mr

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