One of the key events of the festival and an important part of Catalan identity is the sport of Castellers or Human Castles, which is performed by different suburban clubs on different occasions throughout the year, with an annual competition. As well as strength and unity (thereby perhaps, forming a symbol of Catalan identity politics in Castellers), successful castle building also requires music. As the Castellers climb over one another to reach the maximum height, a small group of musicians accompanies the erection with medieval flutes and drumming. The music is not merely incidental, but serves as a form of communication from the technical crew on the ground to the castellers who cannot look up or down to see how the castle is forming, but who must rely on cues from the music to know when the child reaches the pinnacle. Indeed, the public is often requested to remain relatively quiet during the construction to enable the castellers to better hear the music and thus communicate with their colleagues.
Check for the castle beginning around the 1:30 mark. The music begins once a certain stability of the base structure has been achieved and when the lower levels become “blind”. Note the change in music when the child reaches the summit, then the music resumes until the base is disassembled. For each type of castle the music is the same.Except for crowd noise and the growing energy of an anxious or excited public, one wonders why similar musical measures are not used in other sports? People often talk about rhythm and tiempo in football matches, for example, but nobody has ever tried beating on a drum to try and rhythmically pace a match, for example, much like galley slaves would use the beat to set their oars in rhythm.