Complex sentence: Serato began by working with Washington-based Rane Corporation to develop the first Scratch Live supported hardware, the Rane SL1, during which, Serato developed the NoiseMap ™ control vinyls to complete the system.
Split into simpler sentences: Serato began by working with Washington-based Rane Corporation to develop the first Scratch Live supported hardware, the Rane SL1. During this time, Serato developed the necessary NoiseMap ™ control vinyls to complete the system.