"apache/ap_rotor1.wav"  "hl2/gunship/engine_whine_loop1.wav"

"apache/ap_rotor2.wav"  "hl2/gunship/engine_whine_loop1.wav"

"apache/ap_rotor3.wav"  "hl2/gunship/engine_whine_loop1.wav"

"apache/ap_rotor4.wav"  "hl2/gunship/engine_whine_loop1.wav"

"apache/ap_whine1.wav"  "hl2/gunship/engine_whine_loop1.wav"

"weapons/mortarhit.wav" "hl2/gunship/gunship_crashing1.wav"

"turret/tu_fire1.wav"   "hl2/gunship/gunship_weapon_fire_loop6.wav"