I’ve now got a workflow for creating full body harmonic animations for use with the walk script, meaning that although starting life as regular mocap animation data, the converted animations below have no keyframes - the entire animation is composed of 100s of sine waves with varying amplitudes, frequencies and phases.
This means the playback can be controlled with precision and there are no interpolation errors - kind of like the difference between raster and vector graphics. The system has many other advantages of both keyframe and procedural animation techniques, and as far as I know is unique.
HiFi animation is about to get a significant upgrade. Will be posting a link to walk.js 1.4 beta soon.