Anton Brees Carillon Library Anton Brees Carillon Library The Anton Brees Carillon Library, located within the Singing Tower at Bok Tower Gardens, is home to various collections that document the history and development of the Singing Tower and Gardens, the historic Pinewood Estate, and the Guild of Carillonneurs in North America. It also contains many sources on carillon art in general. The library was created in 1968 following the death of Anton Brees, the first carillonneur at the Singing Tower. It is named in his honor. A Carillon is a musical instrument consisting of at least 23 tuned bells in chromatic series, played from
A♭ (musical note) A♭ (musical note) A (A-flat; also called la bémol) is the ninth semitone of the solfège. It lies a diatonic semitone above G and a chromatic semitone below A, thus being enharmonic to G, although in some musical tunings, A will have a different sounding pitch than G. When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of the A above middle C (or A) is approximately 415.305 Hz. See pitch (music) for a discussion of historical variations in frequency. A/G is the only note to have only one other enharmonic.