Complex sentence: Their albums often involve concept stories that run for the bulk of the recording, incorporating many different styles of playing to develop the concept, such as acoustic interludes, or instrumentals not normally present in metal such as Sitar.
Split into simpler sentences: Their albums often involve concept stories that run for the bulk of the recording. Often albums incorporate many different styles of playing to develop the concept, including acoustic interludes, or instruments not normally present in metal such as Sitar.