The Sound rollout lets you place 3D (spatial) or ambient sounds in a scene. The sound may be located at a point and emit sound in a spherical or ellipsoid pattern. The ellipsoid is pointed in a particular direction and may be shaped to provide more or less directional focus from the location of the sound. The sound node may also be used to describe an ambient sound that tapers off at a specified distance from the sound node.
The red ellipsoid of the helper represents the outermost range of the sound's audibility. The blue ellipsoid represents the maximum volume of the sound. The helper's arrow points in the direction toward which the sound is emanating.
See the vsound.max and vsound.wrl files for a demonstration of the characteristics of spatial sound.
The rollout contains the following options:
Intensity: Sets the loudness of the sound. 1.0 is full volume.
Priority: Sets the relative importance of the sound, if you have more than one sound in the scene and the browser cannot play all of them. 0 is least important. 1 is most important.
Spatialize: Makes the sound 3D. A spatial sound has a particular source location in the scene. If this box is clear, the sound is ambient.
Min Back/Front, Max Back/Front: Displays red and blue ellipsoids that allow you to set the area of the sound effect. Inside the blue ellipsoid, the sound is at full volume. Outside the red ellipsoid, the sound is inaudible. Between the blue and red ellipsoids is a fall-off area in which the volume varies in intensity.
Pick Audio Clip: Lets you choose an audio clip. Click this button, then click an AudioClip helper object. The audio clip must already be in the scene and have a sound file associated with it.