DrawRhythmTracks generates BPM-synced sparse track point images with independent X/Y swing patterns (pendulum, bounce, linear). Rendering is GPU-accelerated and compatible with LTXVDrawTracks output format. BPMDetector extracts tempo from audio input using librosa beat tracking. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>