editing a single noise event -Sound Forge - PC - MAGIX Community Forums Archive

Subject:editing a single noise event Posted by: oldshack Date:3/23/2002 11:57:59 PM I have a live recording of a choral work. In the middle of the performance someone knocked over a chair and, of course, it is recorded along with the sound at the time. Is it possible to delete and soften or whatever the loud bang [actually two bangs] without losing too much of the singing? If yes, How?
Subject:RE: editing a single noise event Reply by: Chienworks Date:3/24/2002 7:51:45 AM Generally it's only the attack portion of the noise that is really annoying, and this usually lasts for a very short time. Zoom in on the bang, highlight it from when it starts through the peak, and about as far after the peak as the attack lasts. Select Process, Fade, Graphic, and click the Show wave setting. You can then add a point on the fade line and drag it down somewhat right at the peak. This will give a very rapid falloff in volume at the peak of the noise without affecting anything outside of the range you selected. Some noises can also be helped by graphic EQ. Heavy footsteps are very low frequencies and can be diminished by reducing low frequencies without affecting the music much. I suspect that a chair banging is going to be a pretty wideband noise though. It certainly won't hurt to experiment.
Subject:RE: editing a single noise event Reply by: oldshack Date:3/24/2002 11:29:11 AM Will this edit affect the ongoing choral and orchestral sound when the chair fell? I was able to pull out the short time of the noise and put on the clipbiard for editing. Which I will now do with your help. I haven't done any of this kind of editing before. I assume I can listen to the clip and determine that it is what I want when I am done. when I finish on clipboard how do i put it back? paste?
Subject:RE: editing a single noise event Reply by: Chienworks Date:3/24/2002 1:13:55 PM I wouldn't have bothered copying it to the clipboard. I would just edit it in place in the full file. It will affect the rest of the music slightly. But a fraction of a second of reduced volume will be much less noticable than the bang. At least in my opinion.
Subject:RE: editing a single noise event Reply by: rraud Date:3/25/2002 6:56:04 PM If there's another part in the song that was played and sung the same, you could try to copy that and overwrite that small messed up part or the whole verse. It all depends on how similar the parts are. If they are very close, it can be un-noticable
Subject:RE: editing a single noise event Reply by: dbarry Date:3/26/2002 8:51:13 PM Hi oldshack, I have done that exact edit before. I was recording a choral group and some kid let a folding seat fall -wham. I tried all kinds of filters and smoothing and editing by drawing my own wav at the impulse point. What sounded the best, for my material, was to cut out the actual impulse. By zooming in I could see it was only about 3 millisecs long. Then I selected the next 1/2 second and estimated that the reverberation from the slam was about 480 hz (by looking at it and measuring the period). I then used a notch filter at 480 only on that 1/2 second. I did all this before my general clean up of a live recording which is to do a sub-sonic filer (shelf below 20 Hz) and then a high shelf for DAT artifacts. When all was done I was the only one who knew about that 1/2 second. good luck db

Subject:editing a single noise event

Posted by: oldshack

Date:3/23/2002 11:57:59 PM

I have a live recording of a choral work. In the middle of the performance someone knocked over a chair and, of course, it is recorded along with the sound at the time. Is it possible to delete and soften or whatever the loud bang [actually two bangs] without losing too much of the singing? If yes, How?