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Subject: RE: [motm] The Carlos Vocoder

From: "Tkacs, Ken" <ken.tkacs@...>
Date: 2001-01-08

>> "...A special switch [on the Moog 914 Fixed Filter Bank, the filters for
the Synthesis half of the vocoder] can alter the phase of the stages, which
is the best situation for vocoding, but not neccessarily for the usual uses
of the 914..."
>>
>> Does anyone know what this means?

>Hmm, I thought I should know, but I really don't. Phase relation from one
band to the next is highly important in a vocoder (and it's often overlooked
by beginners who want to build their own vocoder) - BUT the same thing is
true for a filterbank.

The bands should be ∗in∗ phase with each other, no? Is there something good
that happens if you invert alternate bands at the output or something...?

Thanks for the info on the vocal filter. It sounds interesting! I especially
like the sound of that "Vangelis Choir"!