okay gurus, i want to do an effect where music is happily playing along, something happens in the video to stop the fun (change the mood), and i want the music to follow the action by doing one of those quick ramp-down of speed/rate, as if a record player is being unplugged. i see that i can't do a variable speed on an audio-only clip via cmd-j, so tried linking it to a video clip, which sort of worked, but not really. any ideas on how to do this effect?
thanks for helping out a bonehead!
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I know how to do it in After Effects, if that's any help...
Get your timings down in FCP: the point where the should slow, and stop. Keep in mind that as the music slows down, it takes longer to play.
Place the music AIFF file in an AE Comp.
Enable Time remapping.
Put a time remap keyframe at the point in the MUSIC (not the point in elapsed time) where it should stop.
Delete the layer's last time remap keyframe.
Put a time remap keyframe at the point in TIME where it should start to slow down.
Drag out the first time remap keyframe you made -- the one at the point where the music stops -- to the point in TIME where the music should stop.
Play with the graph editor to make the music speed ramp down smoothly, dropping in pitch and finally stopping.
Usually AE's a dog when it comes to audio. But this little trick saves it in my eyes. I used it to slow down a guy singing "A Bicycle Built For Two" just like it happens to HAL in 2001: A Space Odyssey.
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA