Going for making my own video music, instead of the royalty-free route (can RF be applied on "commercial" videos anyway?) I've been searching for software to do the trick.

Don't know how these packages work, though I do play piano, I'm on an extreme budget right as it so happens, I could manage with the pc keyboard.

When going through the mic, would like to alter my voice somewhat, perhaps disguising it.

Anyone familiar with what might meet my needs?