This is the 'client' I'm using, you can refer to it
Just add your audio files.
local engine_sound = "sounds/engine.wav" local idle_soundfile = "sounds/engine_idle.wav" local engine_sound1 = "sounds/audi_start.wav" local idle_soundfile1 = "sounds/audi_stop.wav" local engine_sound2 = "sounds/bmw_start.wav" local idle_soundfile2 = "sounds/bmw_stop.wav" local engine_sound3 = "sounds/bugatti_start.wav" local idle_soundfile3 = "sounds/bugatti_stop.wav" local engine_sound4 = "sounds/camaro_start.wav" local idle_soundfile4 = "sounds/camaro_stop.wav" local engine_sound5 = "sounds/cop_start.wav" local idle_soundfile5 = "sounds/cop_stop.wav" local engine_sound6 = "sounds/engine_2.wav" local idle_soundfile6 = "sounds/engine_idle_2.wav" local engine_sound7 = "sounds/ford_start.wav" local idle_soundfile7 = "sounds/ford_stop.wav" local engine_sound8 = "sounds/kog_start.wav" local idle_soundfile8 = "sounds/kog_stop.wav" local engine_sound9 = "sounds/lambor_start.wav" local idle_soundfile10 = "sounds/lambor_stop.wav" local engine_sound10 = "sounds/lex_start.wav" local idle_soundfile11 = "sounds/lex_stop.wav" local engine_sound12 = "sounds/mer_start.wav" local idle_soundfile12 = "sounds/mer_stop.wav" local engine_sound13 = "sounds/mit_start.wav" local idle_soundfile13 = "sounds/mit_stop.wav" local engine_sound14 = "sounds/nis_start.wav" local idle_soundfile15 = "sounds/nis_stop.wav" local engine_sound15 = "sounds/nrg_start.wav" local idle_soundfile16 = "sounds/nrg_stop.wav" local engine_sound16 = "sounds/pon_start.wav" local idle_soundfile17 = "sounds/pon_stop.wav" local engine_sound17 = "sounds/roll_start.wav" local idle_soundfile18 = "sounds/roll_stop.wav" local engine_sound19 = "sounds/tus_start.wav" local idle_soundfile19 = "sounds/tus_stop.wav" local engine_sound20 = "sounds/_start.wav" local idle_soundfile20 = "sounds/_stop.wav" local sound = nil local idle_sound = nil function getVehicleRPM(vehicle) if (vehicle) then if (isVehicleOnGround(vehicle)) then if (getVehicleEngineState(vehicle) == true) then if(getVehicleCurrentGear(vehicle) > 0) then vehicleRPM = math.floor(((getElementSpeed(vehicle, "kmh")/getVehicleCurrentGear(vehicle))*220) + 0.5) if (vehicleRPM < 650) then vehicleRPM = math.random(650, 750) elseif (vehicleRPM >= 9800) then vehicleRPM = 9800 end else vehicleRPM = math.floor(((getElementSpeed(vehicle, "kmh")/1)*220) + 0.5) if (vehicleRPM < 650) then vehicleRPM = math.random(650, 750) elseif (vehicleRPM >= 9800) then vehicleRPM = 9800 end end else vehicleRPM = 0 end else if (getVehicleEngineState(vehicle) == true) then vehicleRPM = vehicleRPM - 150 if (vehicleRPM < 650) then vehicleRPM = math.random(650, 750) elseif (vehicleRPM >= 9800) then vehicleRPM = 9800 end else vehicleRPM = 0 end end return tonumber(vehicleRPM) else return 0 end end function getElementSpeed(element,unit) if (unit == nil) then unit = 0 end if (isElement(element)) then local x,y,z = getElementVelocity(element) if (unit=="mph" or unit==1 or unit =='1') then return (x^2 + y^2 + z^2) ^ 0.5 * 100 else return (x^2 + y^2 + z^2) ^ 0.5 * 1.61 * 100 end else outputDebugString("Not an element. Can't get speed") return false end end function engine_func() local veh = getPedOccupiedVehicle ( getLocalPlayer()) if veh then --Lykan if getElementModel ( veh ) == 587 then if getVehicleEngineState ( veh ) == true then if getElementSpeed ( veh, "kmh" ) > 10 then if idle_sound then destroyElement ( idle_sound ) idle_sound = nil end if sound == nil then sound = playSound3D ( engine_sound_14, 0, 0, 0, true ) setElementDimension ( sound, getElementDimension(veh) ) setElementInterior ( sound, getElementInterior(veh) ) attachElements ( sound, veh ) end setSoundSpeed ( sound, getVehicleRPM(veh)/10000 ) elseif getElementSpeed ( veh, "kmh" ) < 10 then if idle_sound == nil then idle_sound = playSound3D ( idle_soundfile_14, 0, 0, 0, true ) setElementDimension ( idle_sound, getElementDimension(veh) ) setElementInterior ( idle_sound, getElementInterior(veh) ) setSoundVolume ( idle_sound, 0.5 ) attachElements ( idle_sound, veh ) end if sound then destroyElement ( sound ) sound = nil end elseif getElementSpeed ( veh, "kmh" ) == 0 then if sound then destroyElement ( sound ) sound = nil end end else if sound then destroyElement ( sound ) sound = nil end if idle_sound then destroyElement ( idle_sound ) idle_sound = nil end end elseif getElementModel ( veh ) == 451 or getElementModel ( veh ) == 550 then if getVehicleEngineState ( veh ) == true then if getElementSpeed ( veh, "kmh" ) > 10 then if idle_sound then destroyElement ( idle_sound ) idle_sound = nil end if sound == nil then sound = playSound3D ( engine_sound_4, 0, 0, 0, true ) setElementDimension ( sound, getElementDimension(veh) ) setElementInterior ( sound, getElementInterior(veh) ) attachElements ( sound, veh ) end setSoundSpeed ( sound, getVehicleRPM(veh)/10000 ) elseif getElementSpeed ( veh, "kmh" ) < 10 then if idle_sound == nil then idle_sound = playSound3D ( idle_soundfile_4, 0, 0, 0, true ) setElementDimension ( idle_sound, getElementDimension(veh) ) setElementInterior ( idle_sound, getElementInterior(veh) ) setSoundVolume ( idle_sound, 0.5 ) attachElements ( idle_sound, veh ) end if sound then destroyElement ( sound ) sound = nil end elseif getElementSpeed ( veh, "kmh" ) == 0 then if sound then destroyElement ( sound ) sound = nil end end else if sound then destroyElement ( sound ) sound = nil end if idle_sound then destroyElement ( idle_sound ) idle_sound = nil end end elseif getElementModel ( veh ) == 466 then if getVehicleEngineState ( veh ) == true then if getElementSpeed ( veh, "kmh" ) > 10 then if idle_sound then destroyElement ( idle_sound ) idle_sound = nil end if sound == nil then sound = playSound3D ( engine_sound_20, 0, 0, 0, true ) setElementDimension ( sound, getElementDimension(veh) ) setElementInterior ( sound, getElementInterior(veh) ) attachElements ( sound, veh ) end setSoundSpeed ( sound, getVehicleRPM(veh)/10000 ) elseif getElementSpeed ( veh, "kmh" ) < 10 then if idle_sound == nil then idle_sound = playSound3D ( idle_soundfile_20, 0, 0, 0, true ) setElementDimension ( idle_sound, getElementDimension(veh) ) setElementInterior ( idle_sound, getElementInterior(veh) ) setSoundVolume ( idle_sound, 0.5 ) attachElements ( idle_sound, veh ) end if sound then destroyElement ( sound ) sound = nil end elseif getElementSpeed ( veh, "kmh" ) == 0 then if sound then destroyElement ( sound ) sound = nil end end else if sound then destroyElement ( sound ) sound = nil end if idle_sound then destroyElement ( idle_sound ) idle_sound = nil end end elseif getElementModel ( veh ) == 543 then if getVehicleEngineState ( veh ) == true then if getElementSpeed ( veh, "kmh" ) > 10 then if idle_sound then destroyElement ( idle_sound ) idle_sound = nil end if sound == nil then sound = playSound3D ( engine_sound_21, 0, 0, 0, true ) setElementDimension ( sound, getElementDimension(veh) ) setElementInterior ( sound, getElementInterior(veh) )