removing fan noise from audio track at DVinfo.net

Mark Burlingame · August 1st, 2005, 12:54 PM

Hey everyone,
I have some video that was shot with a ceiling fan running on high in the adjacent room by accident. Unfortunately it is VERY present in the audio track. I can find portions of the audio track that contains only the fan noise and would like to do a digital audio subtraction to remove the noise from the whole track. Is this do-able with a vegas plug-in? or some other software? Or are there other options for removing the sound? I've tried using a notch filter without much sucess... thanks Mark

Michael Liebergot · August 1st, 2005, 01:16 PM

Try using either the EQ filter to remove the fan noise frequency (works well), or if you have access to the noise reduction filter, then select the fan noise and use NR to remove the sample from the entire audio clip.
Be careful though, as your audio may become more tnny and flat if you remove too much of that frequency, as it's in the area of speech.
It's always good to use NR several times in small increments to get the best audio.

You probably won't get all of it out, but enough to make the audio much better than what you started with.

Good luck,
Michael

Edward Troxel · August 1st, 2005, 01:19 PM

Your best bet would probably be the Noise Reduction plugin

http://www.sonymediasoftware.com/Pro...uct.asp?PID=14

Something similar can be found here:
http://www.voxengo.com/product/redunoise/

Patrick King · August 1st, 2005, 02:18 PM

Edward,

I'm a little ashamed to ask this, I should know the answer.

Will Sony's Noise Reduction plug-in work in Vegas or do I really need to quit putting off getting Sound Forge to use the NR plug-in.

Edward Troxel · August 1st, 2005, 02:41 PM

It will work directly in Vegas. (Works well in Sound Forge too!)

Mark Burlingame · August 1st, 2005, 02:41 PM

Thanks for the info. The main problem is that it was a ceiling fan (which seems to spill out a very wide frequency range) and so using eq just doesn't really get rid of it, believe me I tried. I guess I'll have to spend some money... yikes! $280, although it should be quite useful so I suppose it's ok.

Patrick,
From what I can tell, it works directly in Vegas! Mark

Dan Keaton · August 1st, 2005, 03:53 PM

Dear Mark,

I realize it is expensive, but it is very well worth it.

I have been using it for a few months now and I am amazed at what it can do.

It takes a little experimenting, and a little practice to get it right, but it works wonders. I have had audio that was completely unusable, and it made it very usable. You get four filters when you purchase Sony Noise Reduction 2.0.

On the other hand, road noise is harder to remove and takes an experienced user to make obtain the best audio possible when you have bad road noise present. The instructions tell you, for road noise to invoke the filter multiple times, taking out a little (10 db) or so of road noise each time. This does work.

Fan noise is usually very easy to remove using the Sony Noise Reduction 2.0.

Mark Burlingame · August 1st, 2005, 04:40 PM

Thanks for the info Dan, I suspected it was probably a pretty good plugin to have, your comments make me less reluctant to make the investment! M

PS thanks for the tip about road noise, I'll be sure to stay away from bad roads when I am shooting! ;)

Greg Boston · August 1st, 2005, 04:56 PM

Download the FREE software program called Audacity. I have been using it for a couple years and it will also do a very good job of noise removal, especially if you have a clean sample of the noise signature which you indicated you do.

The software is part of the open source project and it's a great tool that runs on multiple platforms. Do a Google search for it.

regards,

-gb-

August 1st, 2005, 12:54 PM	#1
Mark Burlingame Regular Crew Join Date: Jul 2004 Location: Oakland, CA Posts: 77	removing fan noise from audio track Hey everyone, I have some video that was shot with a ceiling fan running on high in the adjacent room by accident. Unfortunately it is VERY present in the audio track. I can find portions of the audio track that contains only the fan noise and would like to do a digital audio subtraction to remove the noise from the whole track. Is this do-able with a vegas plug-in? or some other software? Or are there other options for removing the sound? I've tried using a notch filter without much sucess... thanks Mark __________________ DVX100a, PV-DV953 Rode NT3, NT1a, videomic Raynox HD6600pro WA Lens Vegas6+DVD

August 1st, 2005, 01:19 PM	#3
Edward Troxel Sponsor: JET DV Join Date: Dec 2001 Location: Southern Illinois Posts: 7,953	Your best bet would probably be the Noise Reduction plugin http://www.sonymediasoftware.com/Pro...uct.asp?PID=14 Something similar can be found here: http://www.voxengo.com/product/redunoise/ __________________ Edward Troxel [SCVU] JETDV Scripts/Scripting Tutorials/Excalibur/Montage Magic/Newsletters

August 1st, 2005, 02:18 PM	#4
Patrick King Major Player Join Date: Jul 2004 Location: Enterprise, AL Posts: 857	Edward, I'm a little ashamed to ask this, I should know the answer. Will Sony's Noise Reduction plug-in work in Vegas or do I really need to quit putting off getting Sound Forge to use the NR plug-in. __________________ Fear No Weevil!

August 1st, 2005, 02:41 PM	#5
Edward Troxel Sponsor: JET DV Join Date: Dec 2001 Location: Southern Illinois Posts: 7,953	It will work directly in Vegas. (Works well in Sound Forge too!) __________________ Edward Troxel [SCVU] JETDV Scripts/Scripting Tutorials/Excalibur/Montage Magic/Newsletters

August 1st, 2005, 02:41 PM	#6
Mark Burlingame Regular Crew Join Date: Jul 2004 Location: Oakland, CA Posts: 77	Thanks for the info. The main problem is that it was a ceiling fan (which seems to spill out a very wide frequency range) and so using eq just doesn't really get rid of it, believe me I tried. I guess I'll have to spend some money... yikes! $280, although it should be quite useful so I suppose it's ok. Patrick, From what I can tell, it works directly in Vegas! Mark __________________ DVX100a, PV-DV953 Rode NT3, NT1a, videomic Raynox HD6600pro WA Lens Vegas6+DVD

August 1st, 2005, 01:16 PM	#2
Michael Liebergot Trustee Join Date: Jan 2005 Location: Maryland Posts: 1,505	Try using either the EQ filter to remove the fan noise frequency (works well), or if you have access to the noise reduction filter, then select the fan noise and use NR to remove the sample from the entire audio clip. Be careful though, as your audio may become more tnny and flat if you remove too much of that frequency, as it's in the area of speech. It's always good to use NR several times in small increments to get the best audio. You probably won't get all of it out, but enough to make the audio much better than what you started with. Good luck, Michael

August 1st, 2005, 03:53 PM	#7
Dan Keaton Inner Circle Join Date: Dec 2002 Location: Augusta Georgia Posts: 5,421	Dear Mark, I realize it is expensive, but it is very well worth it. I have been using it for a few months now and I am amazed at what it can do. It takes a little experimenting, and a little practice to get it right, but it works wonders. I have had audio that was completely unusable, and it made it very usable. You get four filters when you purchase Sony Noise Reduction 2.0. On the other hand, road noise is harder to remove and takes an experienced user to make obtain the best audio possible when you have bad road noise present. The instructions tell you, for road noise to invoke the filter multiple times, taking out a little (10 db) or so of road noise each time. This does work. Fan noise is usually very easy to remove using the Sony Noise Reduction 2.0. __________________ Dan Keaton Augusta Georgia

August 1st, 2005, 04:40 PM	#8
Mark Burlingame Regular Crew Join Date: Jul 2004 Location: Oakland, CA Posts: 77	Thanks for the info Dan, I suspected it was probably a pretty good plugin to have, your comments make me less reluctant to make the investment! M PS thanks for the tip about road noise, I'll be sure to stay away from bad roads when I am shooting! ;) __________________ DVX100a, PV-DV953 Rode NT3, NT1a, videomic Raynox HD6600pro WA Lens Vegas6+DVD

August 1st, 2005, 04:56 PM	#9
Greg Boston Wrangler Join Date: Oct 2003 Location: DFW area, TX Posts: 6,117 Images: 1	Download the FREE software program called Audacity. I have been using it for a couple years and it will also do a very good job of noise removal, especially if you have a clean sample of the noise signature which you indicated you do. The software is part of the open source project and it's a great tool that runs on multiple platforms. Do a Google search for it. regards, -gb-