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650 Chapter 20: Managing Scenes and Projects
more or less directional focus from the location
of the sound. The sound node may also be used
to describ e an ambient sound that tapers off at a
specified distance from the sound node.
The red ellipsoid of the helper represents the
outermost range for which the sound can be
heard.Theblueellipsoidrepresentstherangeof
the maximum strength of the sound. The area
between the red and blue ellipsoids represents a
falloff area in which the volume varies in intensity.
The helper’s arrow points in the direction toward
which the sound is emanating.
Note: The Sound helper object must be linked to
an existing audio clip in the scene. Therefore,
you must have an
AudioClip (page 3–655) helper
object in the scene in order for the Sound helper
to play.
Pr ocedur es
To crea te a S ound helper obj ect:
1.
AddaSoundhelperbypressingtheSound
button,thenclick-dragintheTopviewportto
create its icon.
2. Press Pick Audio Clip and select an AudioClip
helper object in the scene.
3. Rotate the icon to determine the direct ion in
which the sound is emanated.
4. Use the controls to adjust the range and
strength of the playback sound.
Interfa ce
The Sound rollout contains the following options:
Intensity—Sets the loudness of the sound. 1.0 is
full volume.
Prior it y—Sets the relative importance of the s ound,
ifyouhavemorethanonesoundinthesceneand
the browser cannot play all of them. 0 is least
important. 1 is m ost important.
Spatialize—Makes the sound 3D. A spatial sound
has a particular source location in the scene. If this
box is turned off, the sound is ambient.
Min Back/Front, Max B ack /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 falloff 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
andhaveasoundfileassociatedwithit.