Silence Injection on Clipping - possible?

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Silence Injection on Clipping - possible?

Permanent link to this post Posted by Adamaeus » Tue Jan 10, 2017 10:16 pm

Hiya. I've been using Audacity to produce audiobooks for the past two years, at a nice little profit to myself. I appreciate the hard work that's been put into creating this program. I especially like the Truncate Silence function, which is a huge help to me because I'm one of those miserable people who likes to take their time. There may be five, or six, seconds between each sentence I read; being able to neatly bring it all together is a huge help.

In most narratives, there are pauses, here and there; page breaks, sub-headings, and the like. Typically, what I do is clap once, very hard, to force the audio to clip; this tells me, when looking at the wave-form, where I need to inject a two-second pause.

But I wonder, is it possible to automate this process? So that, where the application recognizes an instance of clipping, it injects a second of silence on either side of the clipped audio? I'm really not that technical so I can't be sure if it's even possible, but just thought I'd drop it out there.

Thanks.
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Re: Silence Injection on Clipping - possible?

Permanent link to this post Posted by Trebor » Wed Jan 11, 2017 10:03 am

Adamaeus wrote: ... what I do is clap once, very hard, to force the audio to clip; this tells me, when looking at the wave-form, where I need to inject a two-second pause ...
But I wonder, is it possible to automate this process? So that, where the application recognizes an instance of clipping, it injects a second of silence on either side of the clipped audio? I'm really not that technical so I can't be sure if it's even possible

Steve has made plugins called PopMute : which identifies loud noises and silences them,
and ExtendSilence: which is the opposite of truncate silence.

What you've specified would be a combination of the two plugins : identify the loud (clipping) clap, silence it, and insert more silence at that point. So it seems possible.

Adamaeus wrote:... injects a second of silence on either side of the clipped audio ...

Do you really want to leave the clipped audio in ?
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Re: Silence Injection on Clipping - possible?

Permanent link to this post Posted by steve » Wed Jan 11, 2017 2:23 pm

Trebor wrote:Steve has made plugins called PopMute : which identifies loud noises and silences them,
and ExtendSilence: which is the opposite of truncate silence.

but please note that these are "Nyquist plug-ins" and some Nyquist plug-ins may fail with very long tracks. Most Nyquist plug-ins should be fine with up to an hour of audio at 44100 or 48000 Hz sample rate, provided that your computer has a reasonable amount of RAM.
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Re: Silence Injection on Clipping - possible?

Permanent link to this post Posted by Adamaeus » Sun Jan 29, 2017 10:11 pm

No no, I don't want to leave the clipping portion in; I want, if possible, for it to be replaced with silence of a certain duration.

Most of the chapters of the books I read are not quite an hour or so; my system has 8GB of RAM running at 1866MHz, but my processor is a wimpy little dual-core. What would be required to combine these Nyquist plug-ins?
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Re: Silence Injection on Clipping - possible?

Permanent link to this post Posted by Trebor » Mon Jan 30, 2017 3:22 pm

Adamaeus wrote:What would be required to combine these Nyquist plug-ins?

Steve's brain. :D

Or, apply the plugins sequentially ...
First use Pop Mute, set to replace the loud claps with true-silence.
Then apply Extend Silence, with the threshold set so it only is applied to true-silence.

Original , pop-mute , then extend-silence.wav
proof of concept
(1.43 MiB) Downloaded 44 times
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Re: Silence Injection on Clipping - possible?

Permanent link to this post Posted by Adamaeus » Mon Jan 30, 2017 6:17 pm

You may have just saved me hours of editing. Thank you! This is brilliant!
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Re: Silence Injection on Clipping - possible?

Permanent link to this post Posted by Adamaeus » Sun Mar 25, 2018 1:24 am

Trebor wrote:
Adamaeus wrote:What would be required to combine these Nyquist plug-ins?

Steve's brain. :D

Or, apply the plugins sequentially ...
First use Pop Mute, set to replace the loud claps with true-silence.
Then apply Extend Silence, with the threshold set so it only is applied to true-silence.

Original , pop-mute , then extend-silence.wav



Okay. Dredging up a dead topic, but I forgot what settings I'd had to change to get the Pop Mute to inject actual silence instead of just minimizing things. I'd figured it out once but now I'm an idiot and installed a new computer and don't have the old one with the settings I used.

Ah... any chance you could help a guy out? (Sorry to bother, thank you!)
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Re: Silence Injection on Clipping - possible?

Permanent link to this post Posted by Trebor » Sun Mar 25, 2018 4:52 pm

Adamaeus wrote: I forgot what settings I'd had to change to get the Pop Mute to inject actual silence instead of just minimizing things ...

suggested Pop-Mute settings.png
suggested Pop-Mute settings.png (8.6 KiB) Viewed 349 times

You can increase the Pop-Mute threshold to say -0.05dB, that gives you a tiny bit more headroom, but that creates a click.


suggested ''Extend-Silence'' settings.png
suggested ''Extend-Silence'' settings.png (11.97 KiB) Viewed 348 times
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