[sdiy] vocoder : synthesizer part

Magnus Danielson cfmd at bredband.net
Sat Mar 27 18:49:11 CET 2004


From: "jhaible" <jhaible at debitel.net>
Subject: Re: [sdiy] vocoder : synthesizer part
Date: Sat, 27 Mar 2004 18:32:24 +0100
Message-ID: <000e01c41421$aa05ce40$cd71b9d9 at debitel.net>

> Some Vocoders use a pwm'd switch as a VCA - you can only do this before
> the filters.

Thus the "VCA". Just look at the Sennheiser vocoder (look at my site!) and you
see what we mean.

> Also, BPFs after the VCAs will ring / decay smoothly even if the VCA
> would shut down very fast.

Exactly. Right, I forgot that VCAs are not true linear components, they do not
meet the time-invariant criteria! For slow VCA movements is about the same
thought.

Cheers,
Magnus



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