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filtering 50hz from avi file

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December 31, 2004 1:13:41 PM

Archived from groups: alt.audio.equipment,rec.audio.pro (More info?)

the 50hz noise is created by a mic wire,is there a program wich can remove
this?
thanks
Anonymous
December 31, 2004 1:13:42 PM

Archived from groups: alt.audio.equipment,rec.audio.pro (More info?)

In article <41d517a8$0$45950$a344fe98@news.wanadoo.nl>, ace <.> wrote:
>the 50hz noise is created by a mic wire,is there a program wich can remove
>this?

Sure, CEDAR makes a nice tool for removing repetitive noises.

You will note that it's not just 50 Hz, but actually a whole bunch of
harmonics. One notch filter usually won't do the job (but sometimes a
stack of notches will).

As always, it's much easier to fix the problem before recording than after.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."
Anonymous
December 31, 2004 6:11:06 PM

Archived from groups: alt.audio.equipment,rec.audio.pro (More info?)

ace wrote:

> the 50hz noise is created by a mic wire, is there a program
> wich can remove this?

Depends, if it is only hum (50 and harmonics 100, 150 Hz, ? in
diminishing amounts), then yes, if it is hum + buzz (every 50 Hz all
over the audio range) then No. The software from Magix appears to be
interesting from a budget point of view and to nicely fill the niche
left open when Adobe discontinued Cool Edit 2000 after purchasing
Syntrillium to get Cool Edit Professional, now further updated and
renamed to Audition. The software from Steinberg may also be of
interest. All software needs some practice, the software that gives you
most control over what you actually do requires most.

> thanks


Kind regards

Peter Larsen

--
*******************************************
* My site is at: http://www.muyiovatki.dk *
*******************************************
Anonymous
January 5, 2005 9:36:12 PM

Archived from groups: rec.audio.pro (More info?)

>
>the 50hz noise is created by a mic wire,is there a program wich can remove
>this?
>thanks
>



There are a lot of programs that will remove a 50 Hz hum, Cedar is one of the
best. The end result may not sound all that good, but it's better than nothing.

A decent parametric EQ will do a lot to improving the signal as will Hum
removal on DINR with ProTools. DINR has many deep narrow notches that remove
the fundamental and the harmonics. As with Cedar, if you use it too heavily,
you will end up with a bunch of artifacts.

The best thing to do is not record the hum in teh first place by using proper
microphone cables and electrical wiring.


Richard H. Kuschel
"I canna change the law of physics."-----Scotty
!