This letter is used in Germany for the pitch B -natural. Also in German, the letter B is B -flat and His is B-Sharp.See also [Eng.] B; [Fr.] Si; [Ger.] H; [It.] Si; [Sp.] Si.(1) in the German musical system, b natural, or the key of b natural (2) "hoboken", the cataloguer of Haydn's works; h numbers are used instead of opus numbers for the works of Haydn(Ger) B natural in German; B means B flat