Complex sentence: He wrote his first stage music in 1925 for a play by Calderon, Le Magicien prodigieux, using the Pleyela-he was then hired by Pleyel to record rolls on the Pleyela, a revolutionnary player piano at the time.
Split into simpler sentences: He wrote his first stage music in 1925 for a play by Calderon, "Le Magicien prodigieux," using the Pleyela. He was then hired by Pleyel to record rolls on the Pleyela, a revolutionary player piano at the time.