Adobe Premiere CC: Weird Audio-Repeat from Nested Multicam Sequence with Audio Transition (Crossfade)

Following-up from my earlier post, http://blog.davidesp.com/archives/910

Summary:

  • In a nested sequence situation, I’m getting short audio repeats from a clip element just prior to a cut.
  • Solution: for the nested sequence, do menu:[Sequence > Render Audio].
    • That’s just the audio, not the clip/effects etc.  It’s an extremely fast process.

Context:

  • Premiere Pro CC, latest version at time of writing (7.0.1 (105), under Windows 7 (64-bit).
  • Structure: I have a sync-sequence (multicam source sequence) consisting of XDCAM-EX (file structure broadly along the lines of AVCHD) and Z1 (plain m2t files).  Derived from / dependent on that is a multicam edit sequence, where I cut between camera angles.  Then that sequence is itself nested in a master sequence (showing selected extracts of the performance).
  • For reference purposes: Multicam edit sequence consists (among other things) of a rock band’s “big finish” followed by some applause.  I made a cut in the audio part (only) of the nested sequence clip, to enable the audio for the applause to be normalized independently of the band performance.  To smooth the join I added a crossfade transition over the cut.  Nicer in principle than using volume envelopes.
  • When I play the original recording or the multicam sync-sequence or the multicam edit-sequence, all looks and sounds fine.

Problem:

  • When the Master sequence is played back (in preview or an exported/encoded clip) I hear the big finish, then applause starts, then after 2 seconds the “big finish” is heard once again, but at lower audio level.
  • This effect happens wherever I have used the same cut/normalize/crossfade technique in the (nested) multicam edit sequence.  I have also encountered it in previous projects in Premiere CS6.
  • If I delete the crossfade then the problem disappears…  Doesn’t matter what type of audio crossfade is used.

Solution:

  • Open (in timeline) the Cut-Sequence (where one cuts between various multicam angles etc)
  • Menu:[Sequence > Render Audio]

As per my posting in the Adobe forum for Premiere:

<<<

Title: Nested sequence: after a cut, audio repeats from previous clip
Oct 8, 2013 3:11 PM

Summary: In a nested sequence situation, I’m getting short audio repeats from a clip element just prior to a cut.

Context:

  • Premiere Pro CC, latest version at time of writing (7.0.1 (105), under Windows 7 (64-bit).
  • Structure: I have a sync-sequence (multicam source sequence) consisting of XDCAM-EX (file structure broadly along the lines of AVCHD) and Z1 (plain m2t files).  Derived from / dependent on that is a multicam edit sequence, where I cut between camera angles.  Then that sequence is itself nested in a master sequence (showing selected extracts of the performance).
  • For reference purposes: Multicam edit sequence consists (among other things) of a rock band’s “big finish” followed by some applause.  I made a cut in the audio part (only) of the nested sequence clip, to enable the audio for the applause to be normalized independently of the band performance.  To smooth the join I added a crossfade transition over the cut.  Nicer in principle than using volume envelopes.
  • When I play the original recording or the multicam sync-sequence or the multicam edit-sequence, all looks and sounds fine.

Problem:

  • When the Master sequence is played back (in preview or an exported/encoded clip) I hear the big finish, then applause starts, then after 2 seconds the “big finish” is heard once again, but at lower audio level.
  • This effect happens wherever I have used the same cut/normalize/crossfade technique in the (nested) multicam edit sequence.  I have also encountered it in previous projects in Premiere CS6.
  • If I delete the crossfade then the problem disappears…  Doesn’t matter what type of audio crossfade is used.

Is this a known problem? and is there a quick workaround? (other than using envelopes instead or copying/patching the audio up to the master level)

>>>

113 Views   4 Replies   Latest reply: Jim Simon, Oct 9, 2013 8:31 AM

Replies (excerpts):

  • Jim Simon,    Oct 8
    • I do this kind of thing myself and haven’t yet run across this problem.  Try rendering the audio in both the cut and Master sequence.
  • DavidGaryEsp, Oct 9
    • Ah so  [Sequence > Render Audio] is not just a “luxury item” to get waveforms to display when nested or to (presumably) to lower CPU load (e.g. when audio effects have been applied).  It’s something that I will need to always do from now on…   It’s a shame there’s a “feature” but great to know of the workaround.
    • By the way, only the cut-sequence required audio-render in order to remove the problem.  But maybe it would be “good insurance” to audio-render all the sequences.
  • Jim Simon, Oct 9
    • I normally only do it when I have to.

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