1. One mediocre microphone
2. One average audio editing program
3. No pitch pipe
4. A song in my heart
I give you me and two clones. The audio quality is kinda crummy, I admit, but the heart is there. At least I think that's what that is. I like it well enough to let other people listen to it, at least.
And no, that's not a polyphonic plugin or nothing, Mr. Spiny. 3 separate tracks.