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Author Topic: Small blip of increase in waveform amplitude, what's the cause and how to fix?  (Read 3443 times)

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Offline rigpimp

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ycoop, you following along at home?    :P
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Offline ycoop

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Well at work, but yeah.

Don’t have access to Audition, maybe Audacity’s click removal will work.
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Offline bombdiggity

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I'd think any of them would on something simple like this.  It can be trial and error playing with the settings and profiles a bit to get what works best.  Audition has four models in the click and pop and a bunch of settings but I think I more or less rely on one of the defaults. 
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Offline ycoop

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Audacity click removal was not successful. Tried the zero crossings cut from other channel which resulted in a small blip when the cut happens as the two tracks don’t have zero crossings at the exact same locations. I know I could do a fade in/fade out on a new track before and after the cut and then merge the tracks, but that seems like overkill when my original solution was satisfactory.

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Offline Gutbucket

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Zoom way, way, way in on the edit point until you see the discrete sample points of the waveform.  Manually drag a few sample points to smooth out the sharp discontinuity and that will nick the blip.
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Online morst

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Zoom way, way, way in on the edit point until you see the discrete sample points of the waveform.  Manually drag a few sample points to smooth out the sharp discontinuity and that will nick the blip.
Yeah, just pencil-tool right over it, if that's easier. It's just an unwanted noise, right?

Offline relefunt

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I've been following this thread and reading some replies by some very smart and knowledgable people. I thought maybe we might be able to use some thoughts on the issue from someone not so smart and not so technically knowledgable (me).

If one were using Audacity I would recommend first trying the repair tool. If the noise is too many samples long in duration for that, then click repair sometimes works (there are adjustments to how sensitive and specific the tool is -- that can have an effect on what type of click is removed), or even splitting the channels, highlighting the noise, and using negative numbers with the amplify tool until it resembles the baseline, then attaching the channels back to a stereo track.

In terms of "what's the cause" -- there are countless causes of noise, as people have pointed out. Loose cables, RF interference, loose wire in the mic, a power surge from the battery/power source, and I also sometimes wonder about static electrical discharges when touching the gear to make adjustments.

Good luck. Sometimes I record a show and there are a dozen or so UNOs (Unidentified Noisy Object) and other times there are none. i wish i could see a pattern. Maybe someday. Thanks to all the people who contributed to this thread -- i continue to learn quite a bit on TS and I really do appreciate your time and effort.
« Last Edit: June 20, 2018, 03:13:09 AM by relefunt »
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