Pulling out the barrel achieves lower pitch by lengthening the bore of the entire instrument. However, as a side effect, pulling out also creates an air pocket between the barrel and the top of the clarinet body. Since this air pocket has the most influence on the tone holes which are closest to it, pulling out the barrel on most clarinets results in disproportionately flat throat notes. On Rossi clarinets this problem was solved by designing the top of the clarinet body longer and the barrels correspondingly shorter. This moves the air pocket created by pulling out further away from the throat note tone holes. Pulling out therefore tunes the entire instrument proportionately, and the throat notes do not over-react and sag. As a result, Rossi clarinets are extremely versatile, and the different length barrels provided with all Rossi clarinets ensure a remarkably even tuning scale at both American and European pitch levels.