NICOLAS-CHARLES BOCHSA (1789 - 1856) Do you want to improve your technique? Then Bochsa's 40 Easy Etudes, Vol. 1, is the way to do it. All twenty of the original etudes are here, along with a variation for each that puts the emphasis on the left hand. So, both hands get the same workout. Each etude is engraved on two pages for easy reading, with all pedal or lever changes printed large.