Sep 03, 2010 03:32 pm are you saying you can visibly "see" the waveform clipped?
Clipping where there wasn't before
Posted on Sep 03, 2010 02:10 pm
naushikaa
Member Since: Sep 03, 2010
Hi there,
I've openned up some old wav files to listen to, and there's clipping where there wasn't before. Random places, scattered throughout the songs. This has happened on many tracks. They are stereo interleaved files bounced from ProTools. I noticed when playing them on windows media player, so I imported them into a sequencer to check, and yep, those nasty rectangular waveforms are here and there.
To clarify, I've listened to them in their current state many times in the past (5 years ago) and the clipping wasn't there. However, they've been transfered and copied from computer to computer.
Firstly, what could have caused this, and secondly what is the repair solution? I'm using Ableton Live at the moment.
Thanks in advance!
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Sep 03, 2010 03:32 pm are you saying you can visibly "see" the waveform clipped?
Sep 03, 2010 03:56 pm I've uploaded parts of screenshots...
close up...
Sorry if my terminology was incorrect in describing the problem
Sep 03, 2010 07:45 pm hmmm, that looks like clicks ad pops, though ive never seen them like that before.
yeah somethings up. and you say they were never there before??? strange, well only coz i have no clue.
Sep 03, 2010 11:31 pm "Transferred" - How...?
Visually? I'd suspect a clocking error. But it depends on how they were transferred...
Sep 04, 2010 04:47 am I just mean normal computer data transfer, like from disk to disk, computer to computer. Nothing to do with an audio software.
A clocking error you say... can you please tell me how a clocking error normally occurs?
Sep 04, 2010 10:41 am It wouldn't happen transferring files... So we can count that out.
Typically, it'd happen when you're recording from a digital source (if you were transferring digital audio - through a S/PDIF or AES/EBU connection for example - you can only have one clock source and the other clocks need to sync to that master clock. If both clocks (the source and the destination) are running independently, there's not a chance in hell that they'll stay locked together. That's going to cause clicks, dropouts or both.
VISUAL: Ever sit at a red light and watch the turn indicators on two cars that are blinking almost in perfect sync? Then after several seconds you start to see them one after another and then after several more one is turning on as the other is turning off and then it starts over again? Just like a clocking error. Even if both of the "clocks" that control the flashers are set the same (1/second for example), they're not in sync with each other. The only way to keep them in perfect sync would be to connect them both to the same flasher circuit.
Sep 04, 2010 12:06 pm Thank you for your input MM.
The problem is, these files sounded just fine 5 years ago or so. No recording from a digital source has been done- they were finished mixdowns. Since then, the only thing that I can remember these files have gone through is moving from one computer to another... BUT MAYBE, they have been ripped from a CD again for some unknown reason.
Could a ripping program have done this maybe? Sorry, I can't tell you what program I would've used, but probably a common one.
Well, even if a proper conclusion is never found, can anybody recommend software/plugin that will make this better? I'm using Ableton Live
Thanks
Sep 04, 2010 03:38 pm Quote:
It wouldn't happen transferring files... So we can count that out.
I would have thought this too until I transfered some audio files using easy transfer with Vista to bring over files from my old computer. While I didn't get any with clipping added, I had several files that were spliced together (for lack of better term) with parts from somewhere else in the file. I do agree it's highly unlikely but I wouldn't say couldn't happen. :)
naushikaa, If you're using a PC, Download the Adobe Audition Trial, it's fully functional for 30 days and has tools to repair the clipped areas and can do a very good job with it. If you're on a Mac, then I don't know if there are any tools you can use without buying something like Izotope Rx, or other program that has Noise, Pop/Click removal tools.
Dan
Sep 04, 2010 07:34 pm Interesting... I am using Vista, and these files did come from another HD. And come to think of it, there was one file that had a reeeeaaally long silence at the end of the song... like the same length of the song again. That was weird. Sounds like it could be related somehow to your files involuntarily being spliced and mushed together.
Sep 04, 2010 07:45 pm sounds like a good enough reason why i should stay with Apple.
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