Of course there are many different ways in which to achieve great background vocals that are harmonically related. You could have a large choir of people with multiple microphones. You could have a small group of people with a single microphone. You could cut one person tracks and utilize harmony vocal generators within software and controlling those harmonies by use of a black-and-white MIDI keyboards. There is no one way to do what you want. There are many ways. To record a large gospel choir, I have hung 4-8 SM-57's over top of the choir. In a studio situation with only a few people, I have stuck each pair of people on different condenser microphones to stretch the texture. In software, the skies the limit. So you could accomplish that with a single person and a single microphone and make the software do all of the thickening and harmony generation. And then you can also add some effects like chorus, flanging variable time delays with the VL0's available in software. And then you can use all of that together. It's sort of like making a single taco as opposed to a taco salad. It's all the same stuff but one is more grandiose. There is no one single preset in software to create the whole gobbledygook simply.
All those examples were pretty cool sounding and not what we would call simple to do.
Mx. Remy Ann David