[sdiy] vocoder : synthesizer part

[Yves Usson]

Hi

I guess that the VCA after the bandpass filter is probably a better
choice in terms of SNR, the VCA blocks noise from the bandpass
filter. Though I have made no real measurements of this...

Cheers

> Hi,
> 
> I just noticed that in the synthesizer part of a vocoder
> the design can vary : some (like Elektor vocoder AFAIR)
> place the VCA after the BPF, while others (like Roland
> SVC-350 or the Moog vocoder) place the VCA before the
> BPF.
> Is there any good reason to choose one design or the other ?
> 
> Thanks,
> JB
> 

Yves Usson
Lab TIMC, UMR5525, IN3S

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