Sound Keys is a keyframe generator plug-in for Adobe After Effects
Sound Keys is a keyframe generator plug-in for Adobe After Effects 5.0 and higher. It allows visually selecting a range in the audio spectrum and convert the audio energy in the selected frequencies to a stream of keyframes. It is very handy for making extremely audio-driven animations.
Sound Keys fundamentally differs from the keyframe generators that comes with AE. They (wiggler, motion sketch etc) have their own palette, whereas Sound Keys is applied as a regular effect and keyframes are generated into its own output parameters and then linked with an expression (or copied into place). An advantage with this approach is that all settings for the plug-in are saved with the project.
Since Sound Keys was released After Effects 6.0 came out and included the handy new keyframe generator "Convert Audio to Keyframes". The main difference between the two lies in that Sound Keys can extract keyframes from frequency ranges rather than just the overall amplitude. This makes it possible to extract motion from only the kick drum, or only the voice for example. Another difference is that Sound Keys offers different falloff modes.
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