Audio Clicks and Pops appearing in clips

Hi Blake

Sometimes audio downloaded from the interenet and used in FC/iM projects have unexplained clicks & pops. Other times it's because the audi has not been resampled to 48 kHz. So check the source of your audio to see if you can find a better source and or resample the audio to 48 kHz. You can use MPEG Streamclip for this or QT PRO. IF the problem persists, let use know. Perhaps others will chime in with some other possible solutions for you.

Cheers

Carl

Do the clicks & pops always come at the same place?

I gather from your posts... yes.

Are they coming at places where you've made cuts or just where you've made audio eq adjustments.

I'm an audio guy not a FCPX user, just curious.

pancenter-

I'm experiencing something similar, only its with audio I've added (audio attached to the video is fine). Tracks that I insert from audio browser (FCP and iLife collections, as well as iTunes) sound terrible in the rendered project. The defect is hard to describe, but very easy to detect. I've uploaded a quick example, its especially apparent starting at about 00:19.

http://www.youtube.com/watch?v=MeLWOPOSESc

~max

mjcollinge...

Wow, that's bad. From an audio perspective, it sounds like an exaggerated digital sync problem.

This used to happen when audio was transferred from one digital medium to another, and some had forgotten to lock the digital clock sync.

It also happens when:

Trying to fit an audio clip of a certain length (say 30 seconds) into smaller or larger time frame without changing the pitch of the file. Unless a top notch algorithm is used, artifacts are produced.

pancenter-

So I've tried a few things:

~ Rendered a video with just a still image with no other audio but a song selected from the iLife collection

~ Exported just the audio as a few different formats

The result is always the same, crappy audio.

Other postings are pointing to Lion as the culprate...

I'm getting them as well. Didn't notice it until after I rendered my final project out. Not cool.

I've been getting these, as well. I'm also finding that Apple's built in sound files are very prone to this. I've been resaving the audio files as aiff and that seems to fix the problem. I'm wondering if this another bug brought about by an upgrade to Lion.

I've been encountering a number of strange Final Cut X bugs since upgrading to Lion. You'd think Apple would have vetted a brand new program like FCP X better since it's release was close to Lion. Very sloppy work, Apple.

So it certainly is Lion that is the root of the problem. I went back to SL and the mysterious clicks and pops are not present in the same project.

For those having the same issue, did you install FCP onto SL and then upgrade to Lion?

Anyone having this sound issue with FCP that was installed AFTER udating to Lion?

Yes! Ever since I installed Lion, my video exports out of Final Cut Pro X have clicks and stutters. Prior to that, the exporting was fine. It's got to be Lion. I tested some footage through iMovie and it did not have audio problems with the same footage. Why one and the not the other?

Yes, same problem. I don't really now what to do now.

I'm having the SAME EXACT ISSUE! Been driving me crazy! I had FCPX on SL, then upgraded to Lion a few days ago and it's been hit or miss with the renders. Some of them render properly, some clips sound fine inside FCPX and then render incorrectly, and some are fine until FCPX decides to analyze the clips and then it introduces all the clicks and pops which are then clearly audible inside of FCPX. I've done transcoding on clips that have come out OK in Compressor and they seem to come out fine. I'm not quite sure if there is any work around for those of us who have FCPX and Lion...

P.S. A lot of people are talking about importing everything as .AIFF and all this stuff, well, how hard can it be to handle MP3s or Waves? I used Waves for all of the audio and they were perfectly fine until Lion, so this stuff about .AIFF just doesn't seem like a good solution. I'm going to try to create a random track and import stuff as .AIFF and other as .MP3 and .WAV and see what happens. It'd be curious to see if the cracks appear in some parts and not in others (for me they appear so long as there is audio, but stops in between the clips where i've put a 1 second silence)...

Message was edited by: djoliverm

WAV and AIFF are both uncompressed audio and should behave the same.

Most of the other formats are compressed audio and require a few processor cycles to decompress and play on the fly... but since renders are not real-time tasks there -should- be no problem in dealing with most types of audio, compressed or not.

Send Feedback to Apple.

pancenter-

Yeah, already did. I wholly understand audio as I've been a DJ and producer for several years now, so knowing that there is only one audio track with no effects on it and FCPX spits it out with all these artifacts is very annoying. I'm testing right now to see if I export clips as Apple ProRes 422 files and then put those same clips back in FCPX (which is what I'm doing right now to put together several :30 spots into one 2 minute spot), to see if it introduces the artifacts. I have a hunch it might be messing up H.264 files (which is what I've been working with recently, to save space since all of this is going online anyway).

I'll update this post once I finish this test...