Help please. Cropping levels

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oneofthethree
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2011/03/03 14:31:09 (permalink)

Help please. Cropping levels

I've got a recording of a gig, but at one point, my recorder got banged so I have a very loud section for about five to ten seconds which is at 0db.  The rest of the gig peaks at about -12db.  
 
What I'd like to do is crop the original recording at around -12db and then normalise back up to get some more volume on the rest of the gig.
 
Any tips please - I can't seem to find anything in help.  And yes, I am new to this
 
thank you!
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    JD1813
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    Re:Help please. Cropping levels 2011/03/03 14:42:17 (permalink)
    Well, there are some things you can try, sure.  You should let us know what kind of tools you have.  What is your DAW platform, especially what editing tools you may have.  In MC5 you can pull up the recording even if it's a single audio track, and carefully Select  (Edit/ from now / till now being careful to just nudge the one tiny second you've got the worst noise...)  and then use  the Process Audio/Gain to try dropping the gain like -6db at a time, and see if that makes it accceptable.   I also use the free downloadable Audacity editor at times, which can often enlarge the area into a bigger space and allow you a more precise form of the same edit.   Beyond that, I don't know of anything more professional you can do if it's already mixed into one audio file.  You'd have to have it broke down into discreet tracks like a CW Project file, to do better.  Good luck, hope that helped! 

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    Beagle
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    Re:Help please. Cropping levels 2011/03/03 16:11:16 (permalink)
    if you've already recorded it with clipping above 0dB you can't fix it with real results that are acceptable.  using audacity the way JD mentions is doable, but IME it will not yield usable results unless the area you're changing is very small and not clipped very hard in the first place.

    if it doesn't clip at 0 (just the peaks are touching 0, but not "flattened at 0dB) then you can just use a volume envelope to reduce the volume.


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    JD1813
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    Re:Help please. Cropping levels 2011/03/03 16:49:17 (permalink)
    Beagle


    if you've already recorded it with clipping above 0dB you can't fix it with real results that are acceptable.  using audacity the way JD mentions is doable, but IME it will not yield usable results unless the area you're changing is very small and not clipped very hard in the first place.

    if it doesn't clip at 0 (just the peaks are touching 0, but not "flattened at 0dB) then you can just use a volume envelope to reduce the volume.

    You're right Reece and I looked back at the OP again and saw that he's mentioned a 5 or 10-second timeframe and that's a LONG time in music editing terms!  Aside from the points of selecting and lowering gain, and a volume envelope, I can't see any really good solution.  But it can be improved with this type of editing, maybe to a passable level. 

    -John  *Acer Notebook Win7 Pro-x64 /Edirol USB UA-4FX/SP B1 Mic/Sonar PE X2a; Alesis QS-7 & Ovation 12-String.  Site: www.soundclick.com/bands/page_music.cfm?bandID=1007877

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    Guitarhacker
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    Re:Help please. Cropping levels 2011/03/03 20:27:18 (permalink)
    If the section is clipped.....flat tops ... there is no way to fix it.  If the levels are just higher..... not too likley, you can zoom in and highlight that section and then apply GAIN REDUCTION until it matches the levels before and after it.

    Next time, make sure the mic is somewhere where it will not get knocked around.

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