Annoying sound glitch between clips

I often get an annoying sound glitch between clips, when I have the clips sound level on 0 and have a separate audio track. The glitch occurs during transitions. The one I use the most is the cross-fade. I am careful to pull the sound level of the transition clip to "0", but it still produces a loud "click" on the resulting audio track. Any suggestions? Thanks!

Posted on Jul 29, 2005 7:16 AM

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12 replies

Jul 29, 2005 7:37 AM in response to J Michael

I have had this problem also. I did the following.

Highlight the transition, then go to ADVANCED and Extract Audio from the transition.
The audio from the transition will appear on the audio track below. Select just that small audio clip and delete it.

To the far right, there are 3 check boxes. Since you have a separate audio track, make sure that the box for the VIDEO track is UN-Selected.

If that doesn't work,

The other fix is to delete the transition and re-apply a new one.

Jul 29, 2005 10:34 PM in response to J Michael

I have the same problem. The idea of extracting the audio from the transition worked one time but the problem returned during subsequent edits. The glitch only occurs when going from titles, transitions, or photos to video. It does not occur when going from video clip to video clip. The problem is worse on video clips with loud background noise. Any other suggestions?

Jul 29, 2005 11:50 PM in response to J Michael

I am experiencing the same problem with the annoying glitch between clips and transitions. I've extracted the audio from the clip and transitions & then deleting it. I have tried deleting the transition & placing a different one in it's place, I've tried deleting 1 second of the clip when I hear the scratch' (It sounds like a record has a scratch in it ),
I've even went so far as to delete the entire clip and reload the clip from my camera. Nothing works. If anyone else has any more ideas, I'd be interested in trying them out.
Thank you

Jul 31, 2005 2:19 AM in response to J Michael

There were two discussion threads on this shortly after iMovie HD was released, and subsequent updates to iMovie HD haven't made the problem go away. Two key points from the previous discussions 1) sometimes the sound glitch only occurs in iMovie HD preview and is not present once the movie is exported [shared], or sent to iDVD, and 2) sometimes the sound glitch does get carried all the way through the process. It seems to occur just before the end of a clip with sound when the following clip is one with no sound [video, still, title, etc.], or adjusted sound volume. If you do a lot work involving sound adjustments, it's worth going back to a previous version of iMovie [3 or 4]. Don't you just love it when software people "improve" software to the point where it no longer works properly. Unless you have an HD camera, or are absolutely hooked on iMovie HD gizmos, 3 or 4 have all you need, and they work.

Aug 11, 2005 11:05 AM in response to J Michael

Folks - this is the first time I've entered onto any Discussion. Have made some 15 films each between 15 to 45 minutes.
The glitch is most disturbing and can ruin a film. On the original film audio clip find it best to pull down the level to zero at the end of the clip - the full transition between the two clips also completely on zero and the beginning of the next film clip as well. However, if the transition is set at only 0.06 sec or near on, I do not find it necessary to pull down the level. Looking at professional TV documentations, it seems that their transitions are very very short as well.
With longer transitions, I make a rule to pull down the level as mentioned above and add another audio sound, usually music.
On my first films ( not HD at the time ) tried to get some answer from the Mac helpline in Cork, but they seemed not to know of this specific problem.

Aug 12, 2005 5:15 AM in response to SDIllini

Hi Sue,

Thanks for your suggestion. Unfortunately, it doesn't work for me. Certainly, muting the audio for the whole video track does silence the "glitch", but it also silences all the other clips in that track. When the audio for track 1 is re-enabled, the glitch can be heard again.

Another post recommended extracting the audio from track 1, then muting that track before inserting stills, applying transitions etc. That is a good workaround, but it means that ALL the audio must be extracted from track 1 and that the volume must remain muted for that track. I prefer not to use this fix as I find that, in some situations, the extracted audio doesn't remain locked to the video, causing sync problems. These can be tracked down and rectified, but in a lengthy video it can become tiresome and frustrating.

The sound glitch can also occur between video clips - where NO transitions or effects have been applied, nor stills inserted. The glitch appears when fading in the audio on the second clip and, on playback, can clearly be heard at the start of the fade.

iMovie is a great program and I generally enjoy all of its features - but I find the audio glitch by far the most irritating and frustrating unresolved issue in its general usage - almost to the point where you don't want to use it. Basic things, like adding transitions, inserting stills (create still frame) and audio editing (fades) should simply work without having to employ "workarounds" to fix audio issues.

Sorry about the rant 🙂

John

Aug 12, 2005 9:41 AM in response to John Cogdell

G'Day John ;0)

Ranting is understandable at this point!

Just a few ideas for what it's worth:
* Can you extract the audio from
b just
the transition?
* Have you tried zooming the timeline in at the points where there are no transitions but where your still getting glitches? I sugest this so you can see if there is any stray audio clips there or if the audio is actually over-lapping?

Let me know-Sue

Aug 13, 2005 3:22 AM in response to SDIllini

Can you extract the audio from just the transition?


Yes, but the glitch can still be heard - even with the volume reduced to zero for the transition clip and the extracted audio (using the pop-up slider at the bottom of the screen). The only way to silence the glitch is to mute track 1 (the main video track) by unchecking the box at the far right of the track. The glitch appears at the start of the transition, which indicates that it is extraneous audio from the incoming clip.

Have you tried zooming the timeline in at the points where there are no transitions but where your still getting glitches?


Yes, I have also tried this. There are no obvious stray clips or stray audio clips in the timeline. As I mentioned in my previous post, the glitch also appears when fading in the audio in track 1. I just did this on a clip, then dragged the clip to the right to create a black space to separate it from the previous clip. The glitch appeared at the very beginning of the fade, which commenced with a zero volume. The glitch has a scratchy sound, like a tiny piece of audio. Viewing the audio waveforms does not show up any visible problem with the audio.

Thanks for posting back Sue, and for the extra ideas. I'm beginning to wonder whether this audio malady is imposing its presence on PAL users only - OR is it afflicting both PAL and NTSC users? Any comments from other users would be most welcome!

John

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Annoying sound glitch between clips

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