I would like some education on pitch correction capabilities in vocal processors.
I am not such a good singer and I would like some input as to how to use pitch correction or vocoder to keep me on key.

What has been your experience?

I know it won't make me Andy Williams, but ow much will it help, which ones are best and any suggestions on how to best use them?

If it will really help me I would be willing to buy a high end unit like TC Helicon Voiceworks Plus.

Thanks,
Lee