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[OS923]

I want to combine the sound track of an English movie with the video of the German version.
The problem is that the German version is a bit faster.
How can I make the sound "shorter"?

[GaryN]

In OS9, Amadeus or Peak will allow you to shorten the audio in time without changing pitch - within reason.

Keeping things in sync is a different problem however. If there are sounds that need to occur at precise times ("hits" like door slams or any obvious sound that needs to occur in sync with the picture) then you need actual post software. Now you're looking at Final Cut or similar - in OSX. Something simpler like iMovie will allow you to chop up the audio and "slide" the pieces around to line up hits, but you're still in OSX.

It's impossible to give a more accurate answer from here without seeing and hearing what you're working with and exactly how well you want things to sync up.

[OS923]

I found what it is called: audio time-scale modification.

[OS923]

I found a free program for Windows that can do this.
Just choose Speed from the Effects menu.

[GaryN]

That's identical to what I first suggested using Amadeus or Peak, fancy process name notwithstanding.