Complex sentence: During the fall of 2015, Warmsley began working with Al Carlson on completing the album, a majority of the album was created with Max looping rigs and the Roland Integra-7 synth.
Split into simpler sentences: During the fall of 2015, Warmsley began working with Al Carlson on completing the album. They both used Max looping rigs and the Roland Integra-7 synth.