[sdiy] 40-band vocorder

[Justin Owen]

So could anyone describe the differences in sound between a 'classic' vocoder design and something like Ian is suggesting?

Are we talking about the difference between, say, your classic vocoder vocal sound and a dalek voice - or is it really going to be a case of one will sound good and one will sound cack?

Justin



-----Original Message-----
From: Ian Smith [taciturn_unquiet at hotmail.com]
Received: 01.04.2009 00:37:14
To: synth diy
Subject: [sdiy] 40-band vocorder


Hey all,
I'm back with another insane idea. Here are the sources of my madness: A book on Vocal Coding and Formants, Paia Corporation's Vocorder, and Jurgen Haible's 40 band fixed filter bank.
I know some of you just twitched in terror at the thought of all that wire.
For those of you that didn't: 80 filters (2 sets of 40, one for the vocal input one for the instrument input) with 80 sliders, 40 envelope followers, and 40 VCAs.
Yup... there go the rest of you. That twitch was disturbance-in-the-force worthy...
But wouldn't it be awesome to be able to shape both the instrument signal AND the vocal signal?
In other questions... how advanced do the VCAs need to be? Do they have to be full blown log/lin VCAs or would a simple little single transistor VCA like the one in Ray Wilson's Weird Sound Generator work?
-Ian 
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