Originally posted by: kyparrish
Well, it's not quite as easy as downloading a program and forgetting about it.
For starters, look up "Pro Tools." "Reason" is also a good program with a cool UI. You're going to need some hardware too. A midi-keyboard, sound card with midi-inputs, and a good mic (not a computer mic, like a stage mic with a sound card with mic/line inputs) would be 3 things you would need (along with midi cables).
The computer in your sig has some serious horsepower, so that wouldn't be an issue.
Good luck! Google is your friend!
What he/she said, but I would recommend first getting a copy of Sony Acid Music, and playing around with that. If you like using that, then you should consider buying Cakewalk Home Studio, which will have a little bit of everything that you're looking for. I DO NOT recommend ProTools for a beginner (only unless you're seriously considering this as a profession).
You will need a sound card, but for starters everything except on board sound will be good enough to play with. A Soundblaster Audigy-series card is fine for starters. You will need a good mic, but use the line input, the mic input ususally sucks pretty bad.
Instead of a MIDI keyboard, I would recommend a USB-based keyboard instead. Usually easier to setup.
As for chorus, there is some vocal-creation software, but it's pretty complex, and still sounds kinda fake. Your best best (instead of hiring singers) is that you can 'multitrack' and 'pitch shift' the vocal performance to simulate chorus.
As for 'blanking out' chours/vocals, this is usually impossible. Depending on how the vocals are 'mixed', you might be able to reduce them, but you will usually affect the backing track also. I like to explain it to people it's like taking flour, sugar, butter, milk and eggs, and making a cake, then trying to take the flour, sugar, butter, milk and eggs out of the finshed cake.
One thing you can do is to find the 'Acapella' and 'Instrumentals' of songs. Acapellas are the vocal-track only, and instrumentals are the music WITHOUT vocal track. Can be tough to find, but usually can be found at DJ shops, music collector shopping sites, and some file-sharing servers.
Hope this helps!