Slowing Down Audio in Avid Xpress

To make sense out of this excerise, it is a continuation of splicing in a slow motion clip in the middle of some action. So, you may want to read up on a previous exercise to get to that point.

So here is the what you are left with when splicing a slow motion clip in between matching action.

Notice that when editing the slow motion clip to the timeline, there is no longer any audio. The trick is to extend audio from the previous clip underneat the slow motion clip.

Now, it's out of sync by 50%, because our clip in between has a motion effect at 50% applied to it. The trick is to use Avid's audio suite plugin called 'time compression expansion. Audio Suite plug-ins require a segment where you can apply the actual 'plug-in' effect.

To make this work, you will need to place an add-edit to the slow motion clip has a corresponding audio segment underneath it.

Park at the first frame of the slow motion cilp and press the add-edit button.

The slow motion segment has has a corresponding audio segment directly below it.

Next, navigate to the tools menu and select 'audiosuite'.

This will launch the audiosuite menu. Choose 'time compression expansion'

Then press the big purple plug icon. This will launch the 'time compression expansion' filter. Within the parameter box, choose 2.0 for a ratio (meaning twice as much audio). Then press the render button, and then click OK.

Now play your sequence, everything should now be in sync.

For other scenerios, the match works like this:

Divide the number 1 by whatever percentage that you slow something down by. So for example, if you slow something down by 80%.

1 / .80 = 1.25

Or if you speed something up you would end up with a ratio smaller than 1. For example if you speed something up by 200%

1 / 2 = .5

Just type the end result into the 'ratio' box and press the enter key.