How to get rid of audio crackling from stretched audio

[Pickles302]

How to get rid of audio crackling from stretched audio (PAL TO NTSC with pitch correction). The original source file is not available, is it still possible to get rid of the audio crackling and have it back in it's original speed (PAL)?

[davexnet]

You can try and reduce the crackle then change the speed

[Pickles302]

You can try and reduce the crackle then change the speed

But how would one be able to do something like that?

[davexnet]

Any audio editor. For example the free program Audacity has pitch and tempo filters to adjust the speed.
There are some noise reduction filters to try also.

For further assistance post a sample, at least 30 second that shows the problem

[Pickles302]

Any audio editor. For example the free program Audacity has pitch and tempo filters to adjust the speed.
There are some noise reduction filters to try also.

For further assistance post a sample, at least 30 second that shows the problem

Here's the audio. You can hear that it crackles every second or so

[davexnet]

Unfortunately the feedback in Audacity regarding it's effects/noise/click removal is kind of poor,
it doesn't tell you how many clicks were removed, nor does it let you listen to just the clicks.

I can't really hear it with my setup, I would run some tests, turn the threshold down to about 100 or lower and see if it's
removing the noise.

There is also a program called WaveCor that may be a good alternative. It was recently updated and is freeware
https://wavecor.co.uk/

[jagabo]

Here's the audio. You can hear that it crackles every second or so

Is that the source before the stretch? I'm not hearing crackles.

[Pickles302]

Unfortunately the feedback in Audacity regarding it's effects/noise/click removal is kind of poor,
it doesn't tell you how many clicks were removed, nor does it let you listen to just the clicks.

I can't really hear it with my setup, I would run some tests, turn the threshold down to about 100 or lower and see if it's
removing the noise.

There is also a program called WaveCor that may be a good alternative. It was recently updated and is freeware
https://wavecor.co.uk/

Thanks, I'll give it a try!

[Pickles302]

Here's the audio. You can hear that it crackles every second or so

Is that the source before the stretch? I'm not hearing crackles.

This is the source audio with the stretch. The crackles aren't really clear, but you can notice them.

[jagabo]

I'm still not hearing anything wrong. Though there are lots of ambient noises in the background (cars driving around, footsteps, etc.) Are you sure you don't have a playback problem?

[Pickles302]

I'm still not hearing anything wrong. Though there are lots of ambient noises in the background (cars driving around, footsteps, etc.) Are you sure you don't have a playback problem?

Here's a quick example. The third squeaking noise sounds different, like if the audio glitched/stuttered