or Marine Band type harmonica, the standard blues note bending technique involves an interaction between 2 reeds, one blow and one draw. On this style harmonica, only the higher pitched of the 2 notes from any given reed cell can be bent and then only to a point somewhat above that of the lower-pitched reed. The Hohner XB-40 overcomes this limitation by incorporating an additional set of reeds, tuned so that all twenty of the harmonica's notes can be bent using the standard blues harp bending technique. Using a system of patented valve chambers, the auxiliary reeds come into play only during note bending. The Hohner XB-40 is tuned so that every note can be bent a whole tone, with an additional semitone bend on the 3-draw to complete the chromatic scale in the first octave.
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