Hiss/Noise Removal

[brispuss]

I have a similar issue as that for meeshu's post regarding removal of hiss/noise from the audio track of a video.

Although I don't own Izotope, I have access to it for audio editing.

Using Izotope I've tried to remove the hiss/noise by using Deconstruct, and later tried using Spectral De-Noise.

First, tried setting to high noise dB removal for one pass in rendering, then tried setting to low noise dB removal for multiple passes in rendering.

But the results are usually about the same. The noise is considerably removed, but there are artifacts caused after the rendering which distorts the wanted remaining audio (music and effects). The distortion sounds like bubbling or a watery type of sound, and although not too bad it is noticeable.

The sample has wanted background music and some effects as well as the noise.

How to remove this noise without causing any distortion of the wanted sound (music and effects)?

Audio_trimmed_to_noise.flac

[davexnet]

Did you find a second of just noise to take a noise print?

2 passes of Deconstruct

[timtape]

...How to remove this noise without causing any distortion of the wanted sound (music and effects)?

I suspect it's impossible. Listen to a range of online audio noise reduction demonstrations from different vendors and see if you can find an example with such a weak signal under such heavy noise (more noise than wanted signal), which has then been successfully denoised without audible artifacts. I've been looking for some years and have not found one. Certainly denoising tools have improved significantly since they were first introduced professionally in the late 80's but not to the point of dealing with examples like this.

The standard first step is to find a better example/ transfer of that particular recording.

[brispuss]

Did you find a second of just noise to take a noise print?

2 passes of Deconstruct

No. I forgot to mention that I couldn't find a section of audio with just the noise to use as a print or mask.

Your example appears to sound better, but there is still noticeable noise. Thanks anyway.

[brispuss]

...How to remove this noise without causing any distortion of the wanted sound (music and effects)?

I suspect it's impossible. Listen to a range of online audio noise reduction demonstrations from different vendors and see if you can find an example with such a weak signal under such heavy noise (more noise than wanted signal), which has then been successfully denoised without audible artifacts. I've been looking for some years and have not found one. Certainly denoising tools have improved significantly since they were first introduced professionally in the late 80's but not for dealing with examples like this.

The standard first step is to find a better example/ transfer of that particular recording.

Thanks.

The first thing I actually did was to find a section of the track with just noise only to use as a print or mask, but I couldn't find any noise only sections, unfortunately.

Finding alternative better sources may be possible, but may take quite some time(?)

[timtape]

Thanks.

The first thing I actually did was to find a section of the track with just noise only to use as a print or mask, but I couldn't find any noise only sections, unfortunately.

The "noise print" feature or requirement on some older denoiser tools seems a lot less common these days.

Finding alternative better sources may be possible, but may take quite some time(?)

It depends on the recording. If it was a publically sold record and you know the name of the song and the performer, an online search should yield something. Someone with a knowledge of that genre and period of recorded jazz music might recognize the tune and band.

It sounds like an old 78 record copy that was extremely worn out and/or inexpertly played. Possibly a good vertically cut disc such as an Edison Diamond Cut disc but unknowingly played as if it was the more common laterally cut disc.

https://en.wikipedia.org/wiki/Vertical_cut_recording