Can anyone help remove this hum?

Chris H wrote on 8/26/2006, 9:06 PM
I took a feed from the DJ's board at yesterday's wedding and ended up with a hum that started about 10 minutes into the ceremony. Are there any audio gurus out there that would be willing to share settings to remove the humm from this recording?

www.digkeepsakes.com/humm.mp3

I am using Vegas 6.0d and have tried to mess with the eq a little without much success. Any help would be appreciated.

Thanks,

Chris

Comments

Spot|DSE wrote on 8/26/2006, 9:33 PM
You're gonna need a noise reduction plugin to do that well. I only have my laptop speakers here, but it sounds like you could zap that very quickly with NR. Maybe someone could do it for you and send it back to you as a high bitrate MP3 if you don't have NR?
farss wrote on 8/26/2006, 10:10 PM
I'm good for it, email is on this site.

Bob.
newhope wrote on 8/27/2006, 10:25 PM
Like Bob I'm happy to offer some help on this.

The fundamental of the hum is at 61.7Hz according to my quick tests. Using this frequency and it's harmonics I've removed most of the hum. Though you may want to try this yourself by notching at this specific frequency and it's multiples for about five instances.

regards

Stephen Hope
New Hope Media
johnmeyer wrote on 8/27/2006, 11:53 PM
I used three notch filters, one after the other at 60, 122, and 240 Hz. Not much at 180, so I skipped that. Here's the result:

De-hummed


farss wrote on 8/28/2006, 12:34 AM
I'm working on the whole thing at the moment and well, it's not that simple unfortunately. The nature of the hum varies, in places there's a quite high harmonic content and others not. With harmonics past 1Khz with still quite a bit of energy in them killing them without causing artifacts in the speech is a bit of a challenge.

NR2 seems to be the best weapon.
JohnnyRoy wrote on 8/28/2006, 7:21 AM
I just used the New Blue FX Tone Eliminator to completely remove the hum. It was simple. You just use the setting called “Find Tone” and dial up the tone to match what you’re hearing. Then select cut, and increase the harmonics until the tone is gone. Very simple yet very effective.

BTW it actually worked better than NR2 because it is specifically designed to eliminate this sort of tone/hum.

~jr
craftech wrote on 8/28/2006, 3:36 PM
First try the Track EQ filter and use the preset "60 Hz hum notch using four stacked filters". I have NR, but that one filter has worked for me to reduce the sound of a 60 cycle hum.

John
farss wrote on 8/28/2006, 3:53 PM
Here's a gripe:

NR2 is very good however it would be far more useful if it was updated a bit. Unless I've missed something trying to manually adjust the noise footprint is nigh impossible, all it needs is a resizable window / zoom function.

The other function I'd love to see in there is an invert footprint option, that might have some interesting uses.

Bob.

EDIT

Note to self, RTFM.

Does have a very good Noiseprint Zoom, now I can sensibly edit the noiseprint. Why is this such a big deal?

Well what I want to get rid of in a project I'm now working on also has mic preamp noise. Using a noiseprint with both the aircon noise and the tape hiss just kills everything / introduces horrid artifacts.

So edit the noiseprint to remove all points in the speech range, now this thing ROCKS.

Knew those SoFo guys were smarter than I gave them credit for.