1. History of the Piano
... . One of two outstanding improvements was from Sebastien Erard, who invented the double-repetition action in Paris in 1821. That invention allowed very rapid repetition. The second improvement was the full cast-iron frame, invented by Alphaeus Babcock in Boston in 1825. That invention was the basis for today's extended keyboard. Last but not least, the grand piano was developed. The ... the grand piano copied to vertical form. This made the strings and soundboard mounted perpendicular to the keys, so that they would rise straight up. The piano action was a simplified version of the piano...
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- Grade Level: High School