The body of a fashionable soprano clarinet is able with a large number of tone holes of which seven six front, one back are lined with the fingertips, and the rest are opened or closed using a set of keys. These tone holes let the player produce every note of the chromatic scale. On alto and bigger clarinets, and a few soprano clarinets, key lined holes substitute some or all finger holes. The most typical system of keys was named the Boehm system by its dressmaker Hyacinthe Klosé in honour of flute clothier Theobald Boehm, but it isn't an identical as the Boehm system used on flutes. The other main system of keys is termed the Oehler system and is used mostly in Germany and Austria see History. The related Albert system is utilized by some jazz, klezmer, and eastern European folk musicians. The Albert and Oehler techniques are both according to the early Mueller system. Around the turn of the 18th century, the chalumeau was changed by converting one of its keys into a register key to supply the 1st clarinet. This development is typically attributed to German instrument maker Johann Christoph Denner, though some have recommended his son Jacob Denner was the inventor. This device played well in the center register with a loud, shrill sound, so it was given the name clarinetto that means "little trumpet" from clarino + etto. Early clarinets did not play well in the lower check in, so players continued to play the chalumeaux for low notes.