Not everyone would agree with me, but I personally have found Melodyne to be the easiest pitch correction software on the market. I have pitch correction software that I don't even use because I'm pretty much in love with MelodyneI know that the essesntial version doesn't do many of the things that the version I haved does but I'm pretty sure that you can work with most monophonic music (unlike the higher versions that will let you correct individual notes in a chord) amd I thing it will probaly let you stretch and shorten time and shift events on the timeline.

I've used it to doctor audio loops and segments of real tracks from Biab. Usually just small changes in a riff, nothing dramatic

As jim mentions, you can take your base vocal, copy it and shift it all up or down by a third, and fifth, or whatever or just go in and change individual notes. It is a good way to generate harmonies

Keith
2025 Audiophile Windows 11 RYZEN THREADRIPPER 3960X 4.5GHZ 128 GB RAM 2 Nvidia RTX 3090s, Vegas,Acid,SoundForge,Izotope Production,Melodyne Studio,SONAR,3 Raven Mtis