Is it possible to remove noise/crackling that is only in the voice?

Audacity Help Forum GNU/Linux
1

Hello,

I’m running Audacity 2.2.1 on LinuxUbuntu 18.04.2 LTS. I have an audio recording file that has big noise/crackling within the voice and I would like to remove it so the voice sounds clear. The Noise Removal tool only works if I can isolate some noise and make a noise profile of it, but since the noise is only within the voice and not the mute parts it’s hard to make a noise profile. Do you know if there is a tool I could use to get clean audio? Or why it happened in the first place?

Here is a sample of it:

Thank you for your help!

2

It has a weird glitchyness: it looks like tiny chunks are immediately being played backwards after being played normally.

weirdly symmetrical space-invader spectrogram (= forward then backwards).png
weirdly symmetrical space-invader spectrogram (= forward then backwards).png962×504 187 KB

Could manually remove each reversed chunk, but that would take an eternity,
and even then the result may be a jigsaw with pieces missing.

3

I had one like that. It destroyed one recording and then never happened again. It’s recording the chunks of sound out of order. That’s why it seems to be going backwards. If you stick with it long enough, you may find that it gets worse and then slowly gets better.

I have no idea why it happened.

Koz

4

Hello!

Thank you for your suggestions. Knowing that the sound problem comes from the chunks in a weird order helps. Maybe the set up was not powerful enough to support three micros (even though we did some tests before that were fine).

We will record it again, it does seem not worth it to try to correct it.

Thank you for your help!
Sophie

5

What’s your setup? Are you trying to use an aggregate device with multiple USB microphones?

6

Hello steve,

Yes, exactly.
We have used 3 USB microphones (Rode NT-USB Microphone) that we have aggregated in a program (voice meeter banana), then we used the merged signal as input in audacity.

7

I thought Voicemeeter Banana was Windows only :confused: