Complex sentence: Like a piano, it generates sound using keys and hammers, but instead of strings, the hammers strike thin metal tines, which are then amplified via an electromagnetic pickup which is plugged into an external keyboard amplifier and speaker.
Split into simpler sentences: Like a piano, it generates sound using keys and hammers. Instead of strings, the hammers strike thin metal tines, which are then amplified via an electromagnetic pickup which is plugged into an external keyboard amplifier and speaker.