Ed Evans
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Noise Removal Using Noise Track as a Guide
Hi, everyone. I've poked around and so far have not been able to find a good solution for this. The situation is this: I have a stereo .wav file that has spoken word on one track. On the otherr track is a bunch of sorta full spectum noise that changes in amplitude over the course of the 23 minute speech. In fact, that same noise appears to be identical in both tracks. Is there a way to use the noisey track as a guide to "subtract" the corresponding noise out of the speech track? Thanks! Ed
post edited by Ed Evans - 2011/06/17 18:22:25
Ed Evans
Sonar X3d, Roland Octa-Capture, Windows 7 x64
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Jeff Evans
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Re:Noise Removal Using Noise Track as a Guide
2011/06/17 18:37:29
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Hi Ed Well you could try and invert the phase of the noise track and try adding that to the track that has the noise and the speech. This will only work if the noise is the same on both tracks. You might have to juggle the amount of inverted signal to null the noise out.
But otherwise you may need noise reduction type of software to sample the noise and remove it that way.
Specs i5-2500K 3.5 Ghz - 8 Gb RAM - Win 7 64 bit - ATI Radeon HD6900 Series - RME PCI HDSP9632 - Steinberg Midex 8 Midi interface - Faderport 8- Studio One V4 - iMac 2.5Ghz Core i5 - Sierra 10.12.6 - Focusrite Clarett thunderbolt interface Poor minds talk about people, average minds talk about events, great minds talk about ideas -Eleanor Roosevelt
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JoshWolfer
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Re:Noise Removal Using Noise Track as a Guide
2011/06/17 19:16:29
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Aye, if it's exactly the same, you could invert the phase.
I personally have started using iZotop RX and it works really well. If you have no noise tools, I'd be willing to take a minute and run it through RX quickly for you and see if it helps, if it'll quickly get you out of a bind.
Josh Wolfer - Big Dumb Monkey Productions - www.bigdumbmonkey.com (Twitter @bigdumbmonkeyp) Sonar 8.5.3 / X1b :: 2.8 Ghz core i7 :: 8GB ram :: V-Studio 700 C+R :: Maudio Profire 2626 (ADAT lightpipe into Vstudio)
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Ed Evans
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Re:Noise Removal Using Noise Track as a Guide
2011/06/17 21:02:19
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Jeff and Josh, thanks for the tip. I tried inverting the phase of the "noise track" and it didn't quite do the trick. I suppose that the noise on the speech channel isn't identical to the noise on the noise track. :)
I suppose this comment may get me banned form the forum - not because I mention Audacity - but more likely because it highlights my primitive approach. Anyway, here goes. I used Audacity and tried the built in noise removal "effect". It actually kind of worked. Is there a similar, perhaps more rubust, function built-in to X1? I'm not quite ready to shell out the money for RX (although it looks very interesting). I'll poke around in my Sony Vegas Pro 10 to see if there happens to be anything lurking there.
Again, thanks for the help, guys!
Ed Evans
Sonar X3d, Roland Octa-Capture, Windows 7 x64
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Jeff Evans
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Re:Noise Removal Using Noise Track as a Guide
2011/06/17 21:13:32
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Hi Ed. You have got a great surname there. Well I thought maybe the noise might not be the same on both channels. Mentioning Audacity is OK! I have mentioned worse! It just means that the noise reduction capabilites of Audacity might not be extensive.
Sounds like Josh is the way to go. It is very kind of him to have a go for you at least and he will have some better tools to do the job. I am happy to have a go as well. I use the NR process that is within Adobe Audition and with care it also can do a good job. It does depend on the noise and if it is changing a lot in its sound and level etc.
If you want to send it to me you can PM me and I will give you my email address. You could use something like 'You Send It' to send me the uncompressed wave file. Or a free service like that if there is one. Josh might be closer and easier.
Specs i5-2500K 3.5 Ghz - 8 Gb RAM - Win 7 64 bit - ATI Radeon HD6900 Series - RME PCI HDSP9632 - Steinberg Midex 8 Midi interface - Faderport 8- Studio One V4 - iMac 2.5Ghz Core i5 - Sierra 10.12.6 - Focusrite Clarett thunderbolt interface Poor minds talk about people, average minds talk about events, great minds talk about ideas -Eleanor Roosevelt
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benjaminfrog
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Re:Noise Removal Using Noise Track as a Guide
2011/06/17 22:46:05
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Reaper comes with a VST plugin that can do this. Reaper is free to try and cheap to buy. The plugin, however, is not copy protected and will work in Sonar. Voxengo also has a plugin that can do this - more expensive than Reaper, but cheaper than RX.
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Ed Evans
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Re:Noise Removal Using Noise Track as a Guide
2011/06/17 23:26:25
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Thanks, again, for the replies. And, a big thanks for the very generous offers to take a crack at it on my behalf. Unfortunately, the material is sensitive and I can't share it openly. I'll try a free trial or two and see what works. I guess I was thinking that there was something burried in the Sonar plugs that I was missing.
Ed Evans
Sonar X3d, Roland Octa-Capture, Windows 7 x64
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Ed Evans
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Re:Noise Removal Using Noise Track as a Guide
2011/06/18 01:41:00
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Josh - I just tried RX and it does exactly what I was looking for. Great tip. Thanks!
Ed
Ed Evans
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...wicked
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Re:Noise Removal Using Noise Track as a Guide
2011/06/18 03:44:37
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It occurs to me reading this that SONAR doesn't have it's own noise reduction plugin. I've used Sound Forge's NR for this stuff for years and years and it works great.
=========== The Fog People =========== Intel i7-4790 16GB RAM ASUS Z97 Roland OctaCapture Win10/64 SONAR Platinum 64-bit billions VSTs, some of which work
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carlosagm79
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Re:Noise Removal Using Noise Track as a Guide
2011/06/19 12:40:41
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Sound Forge's NR its great, but Waves X-Noise its amazing because have a threshold, and louder vocals/sounds can be unaffected, so less artifacts
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JoshWolfer
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Re:Noise Removal Using Noise Track as a Guide
2011/06/19 15:51:02
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Awesome! glad it worked! I've found RX to be pretty competent at noise reduction. It's easy to go overboard and add artifacts, but with care, it can sound really natural.
Josh Wolfer - Big Dumb Monkey Productions - www.bigdumbmonkey.com (Twitter @bigdumbmonkeyp) Sonar 8.5.3 / X1b :: 2.8 Ghz core i7 :: 8GB ram :: V-Studio 700 C+R :: Maudio Profire 2626 (ADAT lightpipe into Vstudio)
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