Joe W posted some samples:
Basically you need a sound file, an effect file for that sound, If you have more than on sound, you need a controller, then you need an XML to place it. this is just like placing a object.
This is for one sound:
< ?xml version="1.0" encoding="ISO-8859-1"?>
< FSData version="9.0" xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="bglcomp.xsd">
<SceneryObject lat="55.118049" lon="-130.316691" alt="0" pitch="0" bank="0" heading="0" altitudeIsAgl="TRUE" imageComplexity="NORMAL">
<Effect effectName="fx_Gulls3" />
< /SceneryObject>
To add another sound just place another object. Effect Params can be added to the line with the effect name.
Next is the FX file:
[Library Effect]
Lifetime=5
Version=2.00
Radius=24
Priority=1
[Sound]
FileName=gulls3.wav
MinAttenuationDistance=75.00
Looping=TRUE
[Properties]
Cockpit=1
VirtualCockpit=1
Spot=1
Tower=1
Map=1
[Emitter.0]
Lifetime=0.00, 0.00
Delay=0.50, 0.50
Bounce=0.00
Rate=5.00, 10.00
X Emitter Velocity=0.00, 0.00
Y Emitter Velocity=0.00, 0.00
Z Emitter Velocity=0.00, 0.00
Drag=0.00, 0.00
X Particle Velocity=-0.20, 0.20
Y Particle Velocity=0.00, 0.00
Z Particle Velocity=1.00, 2.00
X Rotation=0.00, 0.00
Y Rotation=0.00, 0.00
Z Rotation=0.00, 0.00
X Offset=0.00, 0.00
Y Offset=0.00, 0.00
Z Offset=0.00, 0.00
Pitch=0.00, 0.00
Bank=0.00, 0.00
Heading=0.00, 0.00
The emmitter area has to be there or it wont work. The radius= ## is in meters. this is explained in the effects SDK.
The MinAttenuationDistance= is also in meters and it's the maximum distance it will be heard. this wont work unless you have a controller.
The controller:
[Library Effect]
Lifetime=5
Version=1.00
Radius=200
Priority=0
[controller.0]
lifetime=1.00, 1.00
type=3
delay=10.00, 10.00
x offset=0.00, 0.00
y offset=0.00, 0.00
z offset=0.00, 0.00
random count=0, 0
effect.0=fx_Gulls3, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00
effect.1=fx_RRL_Wolf, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00
effect.2=fx_HDH_Wolf, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00
it's for three sound placement. don't know if it help, is the same guy on the Avsim thread that posted an exemple file there.
Sorry but the effect managment is something I couldn't control very well yet I've tried but i get lost soon
good luck.