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Subject:Using SoundForge to remove an audio carrier signal
Posted by: Rachmaninov
Date:11/9/2010 10:11:05 AM
My audio recordings using a Blue Snowball microphone have an odd sine wave carrier signal that is superimposed on the voice audio. I'm trying to find out if there is a way to remove this signal using Sound Forge. Here is a photo of what the signal looks like. The fast activity superimposed on the sine wave is real voice, the rest isn't good. I'm not sure where the sine wave comes from. I did the recording in a home-made soundroom. (4 cubicle walls put together, with a cubicle wall placed over the roof.) Can anyone tell me how I might remove this carrier signal in Sound Forge 10? Link to my screenshot: http://awesomescreenshot.com/0dd3byac1 Thanks for your help, Rachmaninov |
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Subject:RE: Using SoundForge to remove an audio carrier signal
Reply by: Chienworks
Date:11/9/2010 11:10:07 AM
It looks like that wave is about 6Hz. Use EQ to filter out frequencies below, oh, say 25Hz or so. It looks like there may be some higher frequencies superimposed too, but at a much lower level and sporadic. If what you're recording is really just voice you can probably filter out everything below 100Hz. |
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Subject:RE: Using SoundForge to remove an audio carrier signal
Reply by: musicvid10
Date:11/9/2010 11:11:02 AM
That's a low frequency oscillation at "about" 7Hz. No idea what's causing it, but if it's clean sine wave you should be able to EQ it with a low-cut. If voice is all that's on the track, you can set your cut point as high as 80Hz. If you can still hear splatter after doing the low-cut, and you are not experienced at stacking notch filters, your best bet is something like Izotope, which is not cheap. Message last edited on11/9/2010 11:12:22 AM bymusicvid10. |
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Subject:RE: Using SoundForge to remove an audio carrier signal
Reply by: musicvid10
Date:11/9/2010 11:14:14 AM
Kelly and I simul-posted again. Must be the moon phase. |
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Subject:RE: Using SoundForge to remove an audio carrier signal
Reply by: Rachmaninov
Date:11/9/2010 3:43:34 PM
Thank you both very much... the EQ totally removed the 'carrier' signal that was causing the problem. That saved me some time! I'd send you a giftcard if I knew where to send it :). Best Regards, Rachmaninov |
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Subject:RE: Using SoundForge to remove an audio carrier signal
Reply by: Chienworks
Date:11/9/2010 4:33:51 PM
Glad you got it solved. Just pass the favor on to someone else. That's good enough for me! :) |