Apple has responded to concerns about Final Cut Pro X, the rewritten version of Final Cut Pro that lacks several professional features found in Final Cut Pro 7. Most of the answers can be summed up as, "Not yet, but it will" concerning multi-camera editing, assigning audio tracks, support for some video formats (like RED), and export to XML, OMF, AAF, and EDLs. Apple also notes that plug-in developers need to update their wares to be 64-bit compatible before they will work within Final Cut, and that volume license purchasing will be available soon. follow link
Simulate Multiple Simultaneous Effects in Game Your Video
Although you cannot overlap two audio/motion effects at the same time in Game Your Video, you can always re-edit the video to create stunning effects. So, if you are editing a dance video, for instance, and have applied the Echo effect to one of the dance moves, you can edit the video again to apply a Slow Motion effect as well, for a great result.
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Apple Answers Final Cut Pro X Questions