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Line noise (60 Hz and overtones)

 
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Hans



Joined: 01 Mar 2007
Posts: 1
Location: Illinois

PostPosted: Tue May 08, 2018 9:46 pm    Post subject: Line noise (60 Hz and overtones) Reply with quote

I have a recording I've transcribed from a cassette made in 1992 (the only source available to me now) that has considerable line noise very sharply (perhaps 1 Hz) at 60 Hz and overtones.

Sampling the noise does remove it, but as best I can tell is too broad and removes sound outside the narrow range of the noise.

So my question(s) is (are) this (these): Is there a way using AP 2.1.7 to reduce the signal for a very specific range, say 59-61 Hz, and leave the rest untouched? Or is there even a specific line-noise filter?
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Jim Edgar



Joined: 01 Mar 2010
Posts: 108

PostPosted: Wed May 09, 2018 2:35 am    Post subject: Line noise (60 Hz and overtones) Reply with quote

I'd try the AUParametricEQ or even the 31 band Graphic EQ.  See if a narrow band EQ could do the trick. Jim Edgar

jimedgarvoices.com -  @jimedgarvoices

justaskjimvo.studio - @justaskjimvo









On Tue, May 8, 2018 at 4:06 PM, Hans <forum2mail@hairersoft.com (forum2mail@hairersoft.com)> wrote:
Quote:
I have a recording I've transcribed from a cassette made in 1992 (the only source available to me now) that has considerable line noise — very sharply (perhaps ±1 Hz) at 60 Hz and overtones. 

Sampling the noise does remove it, but as best I can tell is too broad and removes sound outside the narrow range of the noise. 

So my question(s) is (are) this (these):  Is there a way using AP 2.1.7 to reduce the signal for a very specific range, say 59-61 Hz, and leave the rest untouched?  Or is there even a specific line-noise filter?




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jeffgoobs



Joined: 25 Mar 2018
Posts: 10
Location: Boston, MA, USA

PostPosted: Sun May 20, 2018 12:40 pm    Post subject: Reply with quote

Try iZotope's RX 6. You get a fully functioning demo for 30 days:

https://www.izotope.com/en/products/repair-and-edit/rx.html
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Jeff G.
Principal/Owner, The Audio Specialist, LLC
https://www.audiospecialist.net/
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