Hi Mort

> just one external compressor for the voice. Do a second compressor
> will be usefull for the carrier in your experience

A compressor for the carrier is recommended in the case, that the
carrier is not a signal with continous level. Examples: a strings or
organ sound is continous, it does not need compression. A sequence of
strummed guitar chords has many different levels and compression is
recommended.

> Increasing the understandability of vocoded speech is one of my global
> purpose.

I recommend NOT to use very modulated or chorus'ed sounds as carrier. To
My experience a single VCO sound with a Pulswave of 75% Pulswidth but no
PWM is perfect. If you want to have chorus like effects, then put the
chorus effect only on the voiced part of the signal, but not on the
unvoiced part. The easiest way to achieve this will be again the
highpasss filter, that should be mixed with the vocoder sound after the
chorus.


Florian