How to map audio rythem (beat) onto picture movement

[Matthew Mccarter (macattack)]

AK has a tutorial on Video Copilot.net… plus check any of the tuts on making animated volume meters and just apply accordingly.

[Don Sciore]

Really easy, but you can take this to many places(from Ae help):
AfterEffectsAnimation / Assorted animation tools
Convert audio to keyframes
The Convert Audio To Keyframes keyframe assistant analyzes audio amplitude within the work area and creates keyframes for audio amplitude. This keyframe assistant creates a new Audio Amplitude layer representing all audio sources in the composition, with three Expression Controls effects with Slider properties that contain the keyframes: Left Channel, Right Channel, and Both Channels.

To make use of the keyframes created by this keyframe assistant, you must link the changes in audio amplitude to other layer properties. For example, use an expression to link the audio keyframes to the Scale property of a layer to make the layer grow and shrink as the amplitude increases and decreases.

Select the Timeline panel, and then choose Animation > Keyframe Assistant > Convert Audio To Keyframes.

An alternative is Trapcode’s Sound Keys. Check it out:https://redgiantsoftware.com/trapcodesoundkeys.html
Good Luck
Don