[sdiy] vocoder question

[john mahoney]

> On Thu, Nov 20, 2003 at 08:37:29AM -0600, rkmoore at memphis.edu wrote:
> > I'm looking into building a vocoder, but I'm still trying to figure out
> > how I need to set it up.  I've seen several examples of DIY vocoders on
> > the net that vary from 8 band to 20 band setups.  I also looked at the
> > vocoder made by paia, but was disappointed at the quality of the sound
> > samples.

You could combine 2 Paia vocoder kits, modifying them to cover twice as many
frequency bands, where each band has half the bandwidth of the stock kit. I
would expect it to be more than twice as intelligible, although even a
16-band vocoder isn't much by current standards (they've got 39-band
vocoders and such, now).

It's a bit of a kludge, but not too bad, and it's easier than starting from
scratch. You could even make it act like a stereo comb filter by putting
alternate bands on each unit.
--
john