Take a look at this instructional video and learn how to scrub the audio with the program After Effects. You can go about performing this by simply holding the command key and scrubbing the timeline, then that will scrub the audio and render the video. If you hold the option key and scrub nothing will be rendered. But if you hold both the command and the option keys, no video will be rendered but you can scrub through the audio without waiting for the video to render.
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