FSX – Cockpit Sounds For Military Jets. Cockpit sounds is a small add-on that will add “click” sound of switches and other levers. This version is suitable for modern military jets. Made to work 100% with default FA/18 Hornet and Captain Sim Xload FA/18. You will hear specific sounds for each kind of switch and button. Stand alone add-on. No need of other version, but works fine together. By Daniel Gauthier.