Returns the radius of the Source, in meters.
This does not control falloff or attenuation. It is only used for smoothing out occlusion. If a Source doesn't have a radius, then when it becomes occluded by a wall its volume will instantly drop. Giving the Source a radius that approximates its emitter's size will result in a smooth transition between audible and occluded, improving realism.
radius = Source:getRadius()
|radius||number||The radius of the Source, in meters.|