Name of, at the time of writing, two songs, both sung by a computer. The synthesised voice actually manages to sing a tune, rather than just being spoken words as with the all your base song.
Final Fantasy ROBOVoice is about the Final Fantasy game series, and is a version of the chocobo theme.
Megaman ROBOVoice is about the Megaman game series.
Have you heard robovoice?