4 Replies Latest reply: Oct 5, 2010 10:53 PM by avpromedia RSS

    CS4 audio pitch shifter shifts audio track in time (not just pitch)?

    avpromedia Community Member

      Somebody please try this:

       

      Create an audio only sequence (actually I think any type of sequence would work).

       

      Put some audio into audio track 1 (control track)

      put the same audio into track 2. Now you have two identical audio tracks.

      drop an audio pitch shifter into track 2. Make sure formant preserve is checked in the effects control; leave the other settings unchanged. I.e. the pitch shifter should shift by zero, meaning it should do nothing.

       

      Click the arrows next to each audio track so you can see their wave forms. All two tracks should look lined up even when zoom to "frame" level

       

      When exported, the two tracks would go out of sync. There are two ways to reveal this:

       

      Way 1: put track 1 on left channel and track 2 on right channel. Export both tracks into a wav file. If played, there is obvious echo between left and right channel. Or import it back into premiere and look at the left and right channel difference.

       

      Way 2: export only track 2. Then import it back to premiere and put it into track 3. Compare track 2 and 3 and there is about "5 frames" or 1/6 second difference between the two tracks.