Complex sentence: He joined just three weeks before the recording of their first album and in this time, learned to play the moog synthesizer without any prior experience, a role which quickly became a vital component to the flow of each song.
Split into simpler sentences: He joined just three weeks before the recording of their first album and in this time, learned to play the moog synthesizer without any prior experience. A role which quickly became a vital component to the flow of each song.