NASA has confirmed the largest fart, and longest lasting (at 2.5 billion years) in the universe. It is being issued by a Black Hole in the Perseus cluster of galaxies. The "tone" of this fart is a Bb (B-flat), 57 octaves below middle-C. "... this is the deepest note ever detected from an object in the Universe."
It must be a REALLY BIG Black Hole!

Read all about it! ...
http://science.nasa.gov/headlines/y2003/09sep_blackholesounds.htm?list897130