Vox FX is an advanced formant filter plugin. Its well suited for musicians, who make music, which involves heavy processing of sounds, such as techno, trance, ambient, industrial etc. Its a set of more or less crazy filters, which can make your audio sound like ... well just try the trial version or listen to the MP3s on the MHC web page http://www.mhc.se/software / plugins / and you will realize.
