Complex sentence: Liberating the hands for the first time, this evolution saw the bass drum played with the foot of a standing percussionist (thus the term "kick drum") and became the central piece around which every other percussion instruments would later revolve.
Split into simpler sentences: Liberating the hands for the first time, this evolution saw the bass drum played with the foot of a standing percussionist (thus the term "kick drum"). The bass drum became the central piece around which every other percussion instrument would later revolve.