When you write a song that already exists.

[Tawmis]

This made me laugh so much.....

[Rath Darkblade]

Yep, he knows exactly what he's doing.

I've done similar things while fooling around with audio software (like Audacity). I have no piano to fool around with, so I used the only instrument I have -- my voice -- to both create a bass line and a baritenor melody line. (Not at the same time, obviously).

The result wasn't too bad, even if I do say so myself.