News to me is that the typewriter is a percussion instrument! Came across the following on YouTube.
"Viennese Percussionist Martin Breinschmid with his version of the "Typewriter" Live at the BASF concert hall Ludwigshafen, Germany 2008, Strauß Festival Orchestra Vienna"
And then there is The Boston Typewriter Orchestra
The orchestra's website is here.
The tyewriter has also been used to create images (think ASCII Art). Here is an 11 minute visual documentary about typewriter artist Paul Smith.
[YouTube description]: "Paul Smith, born in 1921 with severe spastic cerebral palsy, learned to use a standard typewriter to create beautiful pictures that from a distance resemble fine pencil or pastel drawings. Paul died in Roseburg, Oregon in 2007."