宋编辑功能包括事件和追踪的工具，如量化，挥杆，映射，控制器缩放等等。
Song editing functions include both event and track-based tools like quantize, swing, remap, controller scaling and more.
并实现了播放速度控制、关键帧分析、挥杆分析等的设计。
Furthermore, it expounds how to design the control of play speed, the analysis of key frame and the motion of the cue.
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