A while back there was some talk about Vocalaid here. Here is a possible better alternative.
If you can't sing, can't do vocal vibrato, can't change your gender, don't want to spend tedious hours trying get Vocalaid to turn out a few semi-acceptable seconds of output, and want to do it in real-time by talking into a mic while controlling the pitch from a keyboard, I decided to see how one of TC Helicon's latest devices would do at the job since no such demo exists on their website to demonstrate all of the above and without being camoflauged behind a real singer's voice.
I was too lazy to create volume envelopes for the tracks so excuse the wide dynamic range, especially of the climactic portion. And since the melody dips down kind of low a couple of times after that, it starts to sound a bit gender indeterminant. Perhaps I'll fix it later. But I wanted to see if the quality of their latest products could do lead vocals, not just background harmonies and doubling. It sounds pretty good. An MOTM 440 filter and pedal interface were used to manipulate the Supernova synth sound (just to keep it more on topic).
filesize: 1.4 MB
http://home.att.net/~elhardt2/Elhardt_As_Female.mp3-Elhardt