ChatterBank1 min ago
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For more on marking an answer as the "Best Answer", please visit our FAQ.Although there are a few composers who might qualify, the most renowned is Sorabji, whose Opus Clavicembalisticum, written over several staves and lasting nearly 5 hours, is reputedly to be the most difficult solo piano piece of all time!
http://www.sorabji-archive.co.uk/
On Youtube you can also watch videos of the work played by midi machines which show the score at the same time.
http://www.sorabji-archive.co.uk/
On Youtube you can also watch videos of the work played by midi machines which show the score at the same time.