Recordings of a Semi Truck starting up, idling, shutting down and air brakes. I have including all sounds as one file as well as making separate files of each sound. All files are in both .wav and .mp3 format. Files included are: semi-truck_01 full – 1:04 semi-truck_01 turned on – 0:06 semi-truck_01 idling – 0:46 semi-truck_01 shut off – 0:03 semi-truck_01 air brakes – 0:05