I seem to remember that Alec (technicsplayer) posted on this subject and mentioned something about patent problems with respect to Digitech, who manufacture the well known 'Vocaliser' unit.
A search found this : http://www.synthzone.com/ubbs/Forum25/HTML/000785.html


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Willum
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Willum

After silence, that which comes nearest to expressing the inexpressible is Music.
Aldous Huxley
( especially when the music is played on a KN7000....)