Real time speed change mixing

Wondering if a way exists for me to make on the fly speed changes in real time while doing a voice over. Would like to just play a clip while recording my voice over and be able to freeze the clip while I continue to talk, then hit another key to start the clip moving at regular speed again all while I continue to talk. I don't even necessarily have to do the voice recording using FC. Just would like a way to do this which is a lot like real time audio mixing, but with speed changes. thanks.

The VO tool in FCP requires real-time sync to the playhead, so that won't work that way.
SnapZ allows you to record an image of the desktop, system audio (FCP playback), and the Mac's built-in input all to separate tracks of a QT file. I have used this for software instruction videos. There is a quirkiy issue with snapZ and frame rates. I posted a good workflow to address this a few months back. You would only need to do this if you were going to use the video recorded with SnapZ.
Hope this helps - -
Max Average

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