Recently when i render long video over 5min I start to notice that the notes closing to the ending will drop slightly earlier than original keyboard part (I am still using AE to put keyboard part and particle together because I want different saber effect). It is very noticible if I am rendering something longer than 10min. I tried to do on 3min video and it's not obvious when playing at normal speed but in AE when i play frame by frame, I can see the notes are earlier than the keys getting pressed when I match the beginning perfectly. So I think the rendered particle is slightly faster than actual speed. I tried to rerendered the particle video into 59.94fps in VEGAS to make sure its the same as the keyboard part video but the result is still the same. It's not a big issue but has anyone else experienced the same problem?