modern studios and autotune are a beautiful thing. personaly i can't speak without autotune.
There are a bunch of nice and inexpensive effects for live performance that will autotune you to the right note and give you options on splitting your voice to create perfect harmonies above and below, above and above below and below etc. I've never used anything like that but they sure do make me curious. Some of the demos I've heard were really impressive. I always viewed this as cheating, but the older I get the more my morals are willing to compromise
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Rick