Wwise Unity Integration

Define an inner radius around each sound position to simulate a radial sound source. If the listener is inside the inner radius, the spread is 100%. Note that transmission and diffraction calculations in Spatial Audio always use the center of the sphere (the position(s) passed into AK::SoundEngine::SetPosition or AK::SoundEngine::SetMultiplePositions) for raycasting. To obtain accurate diffraction and transmission calculations for radial sources, where different parts of the volume may take different paths through or around geometry, it is necessary to pass multiple sound positions into AK::SoundEngine::SetMultiplePositions to allow the engine to 'sample' the area at different points.