radio station interference

tadpole wrote on 11/24/2002, 4:18 PM
double fudge....

just shot a wedding - 2 cams. Church had sound system and balcony
so i ran a cable from church pa into mic input on my balcony cam.
Did a quick check - everything seemed ok

Just reviewing the footage n thought someone had a radio on during the service!
turns out, the mic line i had picked up a radio broadccast from AM transmitter down the street!

Sound from cam1 isn't continuous nor acceptable qaul..

ANYTHING i can do?
Only thing i can think of, is get a recording of the broadcast from the radio station (don't they archive?) and find an app that can take out the radio portion from the track by using the original recording as a reference?

the radio single is fairly faint - mic on priest and groom is clear and strong...


Any applications they can do that?
Also, any way i could do a ok job fixing within vegas (meaning i don't have to buy
any expensive new software or plugins

lets hope!
thanks

Comments

Randy Brown wrote on 11/24/2002, 4:35 PM
If there is a silent half second or so with nothing but the station you might have some luck with SoFo's noise reduction. I've heard it is a great product but I think it runs for about $279. There is a demo on their site so you could try it first. The way it works is you take a sample of the unwanted noise and Noise Reduction will remove it without affecting the rest of the signal. It works great on a constant frequency like hiss, hum, etc. but I don't know about varying frequencies unless, because the signal is weaker than the rest, Noise Reduction can see it as noise. It wouldn't hurt to try the trial though.
Good luck,
Randy
BillyBoy wrote on 11/24/2002, 5:07 PM
Kind of doubt it will work. Like Randy said you can filter out noise, but that assumes you are really talking about noise and more or less the SAME noise, like a buzz or hum. If you picked up a radio broadcast the voices/music will be all over the map frequency wise, so trying to filter it out will probably also filter out much of what you want to hear or the clipping will be so severe it won't be worth the effort. When you filter out noise you grap a second or two of "silence" meaning you only record the noise, then the application uses that to build a filter, similar to how a mask works or the video side. Like a video how effective it is depends on how much the background changes. In a video, masking a solid color is easy, masking a ever changing color is much harder, same problem with filtering out unwanted audio.

Another product you can try is Audio Cleaning Lab.
Zulqar-Cheema wrote on 11/26/2002, 4:30 PM
If you could get an original recordin line it up with yours, with the same volume. Do a phase invert, then that shold cancel it out. Basicall the same as a balanced mic works.
TorS wrote on 11/26/2002, 5:08 PM
Can you noise gate the radio? As long as it's drowned in the sounds you want, you should be able to edit/gate out the bothering bits. You'll make ugly holes, so you will have to put a background sound over everything to smooth it over. That could be crowd noise, music or whatever.

Tor