How to slow down the sound of a video clip at the exact same time (keyframes) and values?
I have used the timewarp but the sound isn't affected.
That is to be expected. Only the native time-remapping affects sound, but since AE isn't an audio processing app, the quality is awful. you need to use Audition or a similar program.
Tank you. Do you know how to slow down in audition but not all the sound at the same value and not at the same time. I mean gradually like my video clip? 100% of the speed rising to 25% then after 5sec returning to 100% gradually.
Not gradually in Audition. You'd want to use time remapping in AE, and then you'll be able to do it... and with enough patience, it might even match up to the video.