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-   -   iZotope RX7 / Audio Restoration Question (https://www.gearslutz.com/board/audio-transfers-restoration-and-archiving/1285147-izotope-rx7-audio-restoration-question.html)

That_Violin_Guy 2nd November 2019 01:09 AM

iZotope RX7 / Audio Restoration Question
 
Hello,

I am doing an audio restoration project from a master recording on cassette from 1983 of a high school musical. There are some sections where a singer’s microphone clipped in the PA. It did not clip on the recording, but it sounds bad. Any suggestions for how to get rid of this? I can provide an audio sample.

Hoping to hear from you guys,
Thanks!

Thomas W. Bethe 2nd November 2019 01:21 PM

Sometime RX De-Clip can work. Other than that...good luck!

jamesp 3rd November 2019 02:34 AM

Sometimes De-clip can work but you may have more success with De-crackle. Posting an excerpt of the sound would help.

Jeff Willens 4th November 2019 02:20 AM

Quote:

Originally Posted by jamesp (Post 14300482)
Sometimes De-clip can work but you may have more success with De-crackle. Posting an excerpt of the sound would help.

Yes, some sort of De-crackle program will help soften the distortion. But nothing will fix or remove it. Best you can hope to do is mask it.

That_Violin_Guy 4th November 2019 03:30 AM

2 Attachment(s)
Here are a couple of examples of the clipping. I tried de-clip, with absolutely no effect. I'll give de-crackle a try.

That_Violin_Guy 4th November 2019 05:39 AM

Too much processing
 
On a side question, as a rule of thumb, how much additional processing is too much when restoring archive material? Is it a ‘no go’ to add compression and eq? Can anyone point me to other postings or books/web articles to read?

RJHollins 4th November 2019 06:12 AM

Quote:

Originally Posted by That_Violin_Guy (Post 14302199)
On a side question, as a rule of thumb, how much additional processing is too much when restoring archive material? Is it a ‘no go’ to add compression and eq? Can anyone point me to other postings or books/web articles to read?

EQ [and possible compression] are essential tools I've used in most every Restoration ... but then, this was part of the Clients expectations.

jamesp 5th November 2019 01:00 AM

I've had a quick play with the first file and found that the Fill Single Click button in Adobe Audition's Click/Pop eliminator was the most effective way to remove the distortion. Most of the distortion is in short sections so you can highlight each section of distortion in the spectral editor and just hit the Fill Single Click button the first time and then just hit F3 for each subsequent section of distortion.

Yes, this is a bit labour intensive and you lose some definition on the distorted areas but I found it more transparent than anything that I could do in RX. It may be worth saying that I'm using an ancient version of Audition (V3.01) so things may have changed in later versions.

rovergear 2nd May 2020 04:16 PM

Quote:

Originally Posted by That_Violin_Guy (Post 14298845)
Hello,

I am doing an audio restoration project from a master recording on cassette from 1983 of a high school musical. There are some sections where a singer’s microphone clipped in the PA. It did not clip on the recording, but it sounds bad. Any suggestions for how to get rid of this? I can provide an audio sample.

Hoping to hear from you guys,
Thanks!

If you have RX Advanced try the deconstruct module. The “reduce noise distortion” preset can help a lot when you’re repairing over saturation that can’t be treated with declip.