These stomp boxes have come along way from the last time I remember them.
This box has a lot of options in it. First you can just play notes in the "Choir" mode to add something to your input (Guitar, keyboard, whatever).
Next are the vocoder modes "Vintage" (like what I have heard from a Roland SVC-350) and "Advanced" which brings the effect into this millennium by adding some very nice low end.
Then there is "Talk Box" mode. You can finally play Frampton without triggering your gag reflex. No nasty tube to stick in your mouth either. You talk normal conversation in the microphone and the instrument drives the pitch.
Conclusion
There are so many more things you can do with this effect. You don't realize how much you have heard this in various works until you look for it.
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So, what do you think? Did I miss anything? Is any part unclear?