So I made an animation which was 510 frames long (at 24FPS). I then imported a three second wav file into the video sequencer (selecting synch to AV) and then did my face animation. However when I now render my animation (rendering as PNG) the whole animation seems to have sped up drastically. When i preview the animation in the viewport it is a lot faster than when i actually animated it. Any ideas how i can get it back to it's original speed?