Game Development Reference
In-Depth Information
The Audio Spectrum effect autoanimates—kind of. At its
default settings, it's impossible to get this effect to do anything,
let alone animate. What you need to do is change the top prop-
erty, the Audio Layer, to a layer that contains audio. In our exam-
ple here, change the Audio Layer to the Totally 80s Groovathon
audio layer. As soon as you do, you'll notice this effect spring into
action. From left to right, this line represents the EQ bands of
the audio track from the low bass tones to the high treble tones
( Fig. 9.12 ).
Figure 9.12 The Audio Spectrum
effect, powered by an audio layer.
The spikes in the bands on the left
indicate loud bass tones.
Something that I usually do when fi rst playing around with this
effect is to increase the Maximum Height value. That way, I can
see what this effect is doing a little better. Sometimes, you can
also get more action across the entire band by reducing the End
Frequency value. You can move the spectrum by adjusting the
Start Point value (the left edge of the spectrum), or the End Point
value (the right side of the spectrum). You can alter the number
of points along the path by adjusting the Frequency bands prop-
erty. Or, make them larger or smaller by adjusting the Thickness
property.
Custom Spectrum
Shapes
Color and Audio Spectrum
The Audio Spectrum effect permits considerable control
over the colors used to make the spectrum. There is an Inside
Color value, which controls the color of the core of the bands,
and an Outside Color value, which controls the color of the
glow on the outside of the bands. The Softness property con-
trols the amount of feathering between the Inside and Outside
Color values. You can also adjust the Hue Interpolation prop-
erty to cycle other colors through the spectrum. Fig. 9.13 shows
the result of adjusting these color properties. Also in this fi gure,
you'll see the result of enabling the Use Polar Path option at
the top of the Effect Controls panel, which wraps the spectrum
around itself. This causes the spectrum to emanate radially
from the Start Point.
If the standard
line gets boring,
you can use your
own custom shape or path
with the Audio Spectrum
effect. This will cause the
spectrum to wrap around
a path of your choosing.
Just create a mask over
the layer, and select it
from the Path drop down
in the Audio Spectrum
effect settings in the Effect
Controls panel.
 
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