As described above, a computer animation model can include instructions for generating an output video animation that is configured to animate control points of the model to present pseudorandom motion that is synchronized to audio data. In the example of FIG. 9C, a skeletal model having structure 910 includes bones 940-952. A framework for a computer animation model including data about bones 940-952 along with motion limitations for each bone, influence of each bone on the skin 902, along with any other such information that defines the possible options for a computer animation model. A designer can take the limitations provided by such a framework, including a default state-space of provided movement patterns for the bones, speed harmonics, and other such information, and can modify this information to generate a computer animation model that can be distributed via a network and implemented on a device to create an output video. Designer options can include creation of new motion patterns, selection of probabilities for motion states including specific motion patterns and speed harmonics, synchronization relationships for patterns between bones, selection of thresholds for different animation options or probabilities, or other such information for a specific implementation of a model that can be distributed via a messaging system.
