Crackling sounds when laughing etc.

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RasmusThierry
Posts: 4
Joined: Thu Sep 20, 2018 11:57 am
Operating System: Windows 10

Crackling sounds when laughing etc.

Post by RasmusThierry » Thu Sep 20, 2018 12:25 pm

Hi guys

Laying on my knees here, crying out for help.

So my friend and I recorded the two first episodes of our podcast with clip-on mics and everything went great.
Now we've gotten access to a recording studio where we've been recording another two episodes - but now we're having a whole lot of sound troubles.

When recording with the new equipment we're experiencing crackling sounds whenever we're laughing, our voices are reaching a high pitch etc. Here is an example (about 0:04): https://www.dropbox.com/sh/9heaeyqe95we ... dUD7a?dl=0

I was hoping that i would be able to hard limit my way out of it, but it doesn't seem to be the case.
Do you guys know a way to fix this problem?

Trebor
Posts: 4674
Joined: Sat Dec 27, 2008 5:22 pm
Operating System: Windows Vista

Re: Crackling sounds when laughing etc.

Post by Trebor » Thu Sep 20, 2018 4:02 pm

RasmusThierry wrote:
Thu Sep 20, 2018 12:25 pm
When recording with the new equipment we're experiencing crackling sounds whenever we're laughing, our voices are reaching a high pitch etc.
Your crackling problem is called digital clipping ... https://en.wikipedia.org/wiki/Clipping_ ... l_clipping
RasmusThierry wrote:
Thu Sep 20, 2018 12:25 pm
Do you guys know a way to fix this problem?
Paul-L's De-clicker plugin for Audacity can remove the worst of it ...

Before-After de-clicker.flac
(685.44 KiB) Downloaded 7 times
de-clicker settings used.png
On these settings processing is slow : processing-time ≈ playback-time.
de-clicker settings used.png (24.75 KiB) Viewed 227 times

RasmusThierry
Posts: 4
Joined: Thu Sep 20, 2018 11:57 am
Operating System: Windows 10

Re: Crackling sounds when laughing etc.

Post by RasmusThierry » Tue Sep 25, 2018 2:45 pm

Thanks!

It's doing an amazing work on the example - i can't hear any crackling sounds at all.

Unfortunately it doesn't sort out all of the crackling sounds when i'm using the plug-in on the whole recording.
Here is an example where i have a hard time making it sound bearable: https://www.dropbox.com/sh/xtm1fkm4ktgi ... mQaea?dl=0

I've tried to adjust the different settings/parameters in the plug-in but I can't get rid of the clipping...
Could you advise me in which settings i should be adjusting to optimize the de-clicking?

Trebor
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Joined: Sat Dec 27, 2008 5:22 pm
Operating System: Windows Vista

Re: Crackling sounds when laughing etc.

Post by Trebor » Tue Sep 25, 2018 4:16 pm

RasmusThierry wrote:
Tue Sep 25, 2018 2:45 pm
Here is an example where i have a hard time making it sound bearable: https://www.dropbox.com/sh/xtm1fkm4ktgi ... mQaea?dl=0
I've tried to adjust the different settings/parameters in the plug-in but I can't get rid of the clipping...
Could you advise me in which settings i should be adjusting to optimize the de-clicking?
You have digital-clipping, the clipped samples change sign: >1 becomes -1.
The De-Clicker plugin can't repair that smoothly.

The only way I know of fixing that type of clipping on Audacity is manually repairing each clipped section individually ...
before-after manual repair.wav
(652.79 KiB) Downloaded 7 times
which will take a long time.

kozikowski
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Re: Crackling sounds when laughing etc.

Post by kozikowski » Tue Sep 25, 2018 7:34 pm

Now we've gotten access to a recording studio where we've been recording another two episodes
With a recording engineer? Who set your sound levels? High recording sound levels is what produces clipping and high volume distortion. As you're finding, that's super hard to fix. During clipping, the microphone system stops following the show. The only way to "fix" that is to make up new sound and hope it fits. That's what Clip Fix and those other tools do. That's why if the distortion is bad enough, you shoot it over.

You also violated a studio convention. Did you check the first show before you started the second one?

At the end of the first performance, roll the show back and spot check play it here and there for sound quality. If you're in Audacity, set View > Show Clipping to ON. That will give you red marks in the timeline at all the damage points. You don't even have to listen through the whole show.

Image


Koz

RasmusThierry
Posts: 4
Joined: Thu Sep 20, 2018 11:57 am
Operating System: Windows 10

Re: Crackling sounds when laughing etc.

Post by RasmusThierry » Thu Sep 27, 2018 1:37 pm

Trebor wrote:
Tue Sep 25, 2018 4:16 pm
RasmusThierry wrote:
Tue Sep 25, 2018 2:45 pm
Here is an example where i have a hard time making it sound bearable: https://www.dropbox.com/sh/xtm1fkm4ktgi ... mQaea?dl=0
I've tried to adjust the different settings/parameters in the plug-in but I can't get rid of the clipping...
Could you advise me in which settings i should be adjusting to optimize the de-clicking?
You have digital-clipping, the clipped samples change sign: >1 becomes -1.
The De-Clicker plugin can't repair that smoothly.

The only way I know of fixing that type of clipping on Audacity is manually repairing each clipped section individually ...

before-after manual repair.wav
which will take a long time.
Thanks! I'll give it a try.

RasmusThierry
Posts: 4
Joined: Thu Sep 20, 2018 11:57 am
Operating System: Windows 10

Re: Crackling sounds when laughing etc.

Post by RasmusThierry » Thu Sep 27, 2018 2:33 pm

kozikowski wrote:
Tue Sep 25, 2018 7:34 pm
Now we've gotten access to a recording studio where we've been recording another two episodes
With a recording engineer? Who set your sound levels? High recording sound levels is what produces clipping and high volume distortion. As you're finding, that's super hard to fix. During clipping, the microphone system stops following the show. The only way to "fix" that is to make up new sound and hope it fits. That's what Clip Fix and those other tools do. That's why if the distortion is bad enough, you shoot it over.

You also violated a studio convention. Did you check the first show before you started the second one?

At the end of the first performance, roll the show back and spot check play it here and there for sound quality. If you're in Audacity, set View > Show Clipping to ON. That will give you red marks in the timeline at all the damage points. You don't even have to listen through the whole show.


Koz
It's a recording studio at my school so we're responsible for all the settings ourselfs.
My friend and co-host has some experience with recording radio but obviously he didn't get it all right this time.
We'll make sure to do some testing next time so that we don't run into the same problem!

KiraJanene__
Posts: 1
Joined: Mon Oct 01, 2018 5:53 pm
Operating System: OS X 10.10 Yosemite

Re: Crackling sounds when laughing etc.

Post by KiraJanene__ » Mon Oct 01, 2018 5:55 pm

This is also happening to me when making a podcast for a class assignment! :(

steve
Site Admin
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Joined: Sat Dec 01, 2007 11:43 am
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Re: Crackling sounds when laughing etc.

Post by steve » Tue Oct 02, 2018 8:09 am

KiraJanene__ wrote:
Mon Oct 01, 2018 5:55 pm
This is also happening to me when making a podcast for a class assignment! :(
What is?
Does Koz's suggestion resolve the problem?
9/10 questions are answered in the FREQUENTLY ASKED QUESTIONS (FAQ)

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