Carillon Carillon A carillon ( or ; ) is a musical instrument that is typically housed in the bell tower (belfry) of a church or municipal building. The instrument consists of at least 23 cast bronze, cup-shaped bells, which are played serially to produce a melody, or sounded together to play a chord. A traditional manual carillon is played by striking a keyboard – the stick-like keys of which are called batons – with the fists, and by pressing the keys of a pedal keyboard with the feet. The keys mechanically activate levers and wires that connect to metal clappers that
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.