Wednesday, November 10, 2010 at 8:03PM 
THEMYSTICBLACK from Peder Norrby on Vimeo.
Audio-driven animation using Trapcode Sound Keys to drive Particular. Music: Autechre - plyPhon. Here is a quick tutorial showing how the AEP was made:
THEMYSTICBLACK - tutorial from Peder Norrby on Vimeo.
Download AE project file (AE CS4): THEMYSTICBLACK.aep
Tuesday, March 23, 2010 at 2:19PM 
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Linking Trapcode Sound Keys to Particular is a lot of fun!
This example shows linking the output of Sound Keys to Trapcode Particular's Particles/sec paramter. The effect is that on each kick drum beat, particles are emitted. Note that you need some base to properly hear the kick drum, a laptop may not provide enough base.
Download AE6 project file: beat_explode.zip (1.2M)
Tuesday, March 23, 2010 at 2:09PM 
View quicktime movie
Sound Keys was first used to extract three separate streams from the base region of the audio spectrum. Then three instances 3D Stroke was used to create the "strings". Each has an animated path that describes a vibrating string. 3D Stroke's Path Time, found under Advanced, was used to control the movement of the strings. Each has an expression where a sine function describes the general movement of the string and this is then multiplied by the stream extracted by Sound Keys so that the strings appear to vibrate with their corresponding base frequency.
Download AE 5.0 AEP
Tuesday, March 23, 2010 at 2:00PM 
View quicktime movie
Trapcode Sound Keys - Fallof None example (advanced)
This example shows the Falloff None (integrate) mode where the output signal is integrated over time to form an ever-growing signal. In this example the ouput from Sound Keys was used to set the X position of the small white circle. By using the Falloff None (integrate) mode the circle appears to be pushed ahead by the beat. When there is no beat, the circle just stands still. Trails by AE Echo (AE built-in effect).