Just been listening to Gerrard Hoffnung's Concert at the Festival Hall, Sheer musical lunacy, including a sympphony for three vacuum cleaners and a floor polisher, and the late Dennis Brain playing Leopold Mozart on a length of garden hose (and making it sound musical!)
Hoffnung was a cartoonist by trade, and some of his stuff is brilliant, there is a famoous one of a mixed choir , all mouths open, with a blackbird flying into them with a mouthful of worms.
Sadly, I have been unable to find much of his work on the net.

FC