Audacity Forum

If you listen to this audio http://img142.imageshack.us/i/air.mp4/ file which is a MP3, which you can just rename from MP4 to MP3, you'll hear it has a Woosh, Air Pound type sound. That is the only way I know how to describe it, and I'd like to know how I can remove it ?

LionBear wrote:If you listen to this audio http://img142.imageshack.us/i/air.mp4/ file which is a MP3, which you can just rename from MP4 to MP3, you'll hear it has a Woosh, Air Pound type sound. That is the only way I know how to describe it, and I'd like to know how I can remove it ?

LionBear,

I'm probably doing something wrong, but I keep getting the message:
"An error occured during video conversion, please try again later or upload another video"

Have you tried using a simple low pass filter for the woosh sounds. A high-pass filter might address the pounding sound. Also, Effect > Noise Removal might be of some help. For a discussion of Noise Removal, click here.

I hope this helps.

You can't just rename MP4 to MP3. Or most people can't.

Wind noise is rough to get rid of. You can adjust the graphic equalizer like this...

http://kozco.com/tech/audacity/100Hz_Rumble.jpg

Detail...

http://kozco.com/tech/audacity/RumbleDetail.jpg

Or you can try using the Hi Pass Filter which may be only available in Audacity 1.3. You can have both 1.2 and 1.3 on your machine as long as you only use one at a time. Audacity 1.3 projects will not open in 1.2.

Most of the grownups use wind noise prevention to keep from having the noise in the first place.

http://www.koalawindsocks.com/

Koz

The High pass filter, did get rid of the swoosh noise. I have the section of audio that I've applied the swoosh noise. The section of audio that the high pass filter was applied to, is a little softer/quieter then the rest of the audio clip. How can I get the audio to match that of the rest of the audio clip now that the swoosh sound is removed so that is sound the same as the rest of the clip ?

Select just the section that you have filtered and use Effect > Amplify.
Start with a value of 3 in the "Amplification (dB)" box. Undo and experiment with different values until it sounds right.

PO'L

I've tried that, I end up getting the pound air sound coming back slightly. Or that section of audio gets louder the rest of the audio clip, I'll fiddle around with it once more, but I thought I'd mention that in case no matter how much fiddling I do my results are the same as before

A lot of the time, wind noise appears as a very low, throbbing, rumbly sound (In California, Earthquake Sounds). If that's the case, then the high pass filter can suppress all those sounds without affecting the rest of the show. If the wind is high enough, it starts becoming more intrusive as it whistles around the microphone and starts vibrating the internal screens. That's when you get to shoot the work again.

I know of no way to get rid of high wind noise. That's usually fatal.

Koz

Thank you, I'll try again with the high pass filter maybe I can do a little adjusting and make it work for me, I hope !

The 100Hz filter I published is copied from the hardware one made by Shure Brothers.

http://store.shure.com/store/shure/en_U ... .104210700

With that one, very few people can tell you did anything, but the rumbling sounds go away.

You can start to crawl up in frequency with the HiPass Filter and listen carefully as you go. I say listen carefully because you need a good sound system to hear any of these changes. Computer sound systems tend toward consumer grade sound and not production sound. If you're listening on earbuds or laptop speakers, none of this will be apparent to you and you'll never hear any of these tools work.

Anyway, start using higher and higher High Pass numbers; 125 Hz, 150Hz, 175hz, 200Hz. Sooner or later, you're going to find the show start to sound whispy and gutless. That means you went too far. If the noise is still there and you did that, then that's the end of the equalizer tools and maybe the show.

Koz