Remove strange noise

[Fredrik_A]

I have an old recording from a church with a very annoying noise (I think there were microphones hanging from the roof) that I haven't been able to remove so far. I checked the file in Sound Forges Spectrum Analysis (screen shot attached) and there is a repetitive peak that comes every 100 Hz. I've never seen this kind of noise and wonder anyone know how I can remove it? Perhaps there's some "special" plugin to eliminate it?

Fredrik

[Soopafresh]

Do you live in Europe by any chance ? It could be 50Hz hum. I believe there is a filter in Soundforge to remove 50Hz (and 60hz for the US) hum. Just an idea.

[Fredrik_A]

I tried that but it didn't work. I think this is something else and I hope there could be some good filter for it.

[tdan]

I am not convinced that the peaks in your diagram are the noise you are trying to remove. They look suspiciously like the harmonics from a pipe organ (http://www.pykett.org.uk/how_the_flue_pipe_speaks.htm).

Is there organ music in the audio sample? If not, can you describe the annoying sound? Is it like a buzz, hum, static?

Dan[/url]

[redwudz]

Probably a long shot, but Audacity has a programmable noise filter. You take a sample and use that to kill the noise. Sometimes works, also have had it kill the whole audio track. There are a couple of other filters there that might help, also. Anyway, the program is free, might try it.

[Fredrik_A]

This is what it sounds like: noise.mp3


tdan: I'm sure it's not a pipe organ because it's there many times in the same recording but with different level (and it don't sounds lika a pipe organ).

redwudz: I tried the software but it didn't work very well. I've also tried to remove it in Sound Forge but with no succes.

Thanks,
Fredrik

[Soopafresh]

Good luck on that one. Tried it through various programs and filters. It covers too much of the audio spectrum to eliminate.

[Fredrik_A]

Hmm, I was afraid of that too. Thanks anyway.