Airplane sound effects simulation pack; from engines start to landing. For flight simulation to flight.........triggers are from 1 - 8 already sequenced in order of flight. For flight simulation to landing.......... triggers are from 9 - 13.......... Again, triggers are 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 Type into chat area to activate triggers enjoy :) Contact me for any questions.