[sdiy] VCO Linear FM input - DC or AC coupled?

Neil Johnson neil.johnson71 at gmail.com
Mon Jun 26 23:28:44 CEST 2023


Hi,

On Mon, 26 Jun 2023 at 22:20, Mattias Rickardsson <mr at analogue.org> wrote:

> Neil Johnson <neil.johnson71 at gmail.com> skrev:
>
>> ...
>> Purists will pop up and say that when the modulating signal is a sine
>> wave there is no difference between the two, and that's fine (lets ignore
>> the pi/2 difference between sin and cos, eh?).
>>
>
> Surely the amplitudes differ, right? And the modulation depth that
> follows. Louder treble and weaker bass in a differentiated sine wave. :-)
>

Only because your differentiator is rubbish!


> PS: I'm often thinking of the "local DC offsets" of modulated or suddenly
> started sounds, and how to deal with that. Don't know if it's normal.
>

That's why we have window functions in DSP :)

Neil
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