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How to erase voice and low hum?
How to erase voice and low hum?
Finally,I have a question about the audio track. I am using a Panasonic GH1 with Pany external mike. How to erase in Platinum 10.0 the low hum which is audible when the scene is quiet.? Any easy way to erase voices?
Thanks very much.
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18 Replies
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Use a Audio noise reduction plugin, Such as sony’s
own noise reduction plugin.The best however is “Izotope RX”
Steve Rhoden
(Cow Leader)
Creative Arts Director and Film Maker.
Project Samples at:
http://www.youtube.com/hentys -
BIAS Sound Soap 2 is also good and inexpensive if you can’t afford iZotope RX or the Sony Noise Reduction plug-in.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Thanks Guys,
I will give them a try. Bit more expensive than I had anticipated?
Any decent programs for about $50?
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If the hum is a constant narrow frequency, you can setup a notch filter in the EQ that comes with Vegas,it’s in every audio track as well as compressor and noise gate in the Vegas pro versions by default. If it’s not in Plat., add it in the event or track effect chain and make a very narrow filter cutting out the middle as far down as it allows, then while playing the track, slide the frequency slider until the hum goes away. As far as removing voices, I’m not knowledgable in that.
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[Danny Hays] ” As far as removing voices, I’m not knowledgable in that.”
Simple… you tell the people to shut up! 😉
More seriously, you probably can’t remove the voices of people talking. The “noise” is just too random to target and the frequency to broad to just remove and not affect everything else.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Most hum is 60hz, our electrical systems run at a frequncy of 60hz (50hz in europe). If you use an EQ with a roll off or “low cut filter” at somewhere between 60 & 75Hz it will help for hum. If the hum is from your camera or an HVAC system, it may not be in the 60hz area. Another thing that a lot of people are not away of is that you have upper harmonics of a sound as well, so if you remove just 60hz multiples of that may also be heard…just for you info….Good luck!
Scott Francis
Mind’s Eye Audio/Video Productions -
[Scott Francis] “Most hum is 60hz, our electrical systems run at a frequncy of 60hz (50hz in europe). If you use an EQ with a roll off or “low cut filter” at somewhere between 60 & 75Hz it will help for hum. “
Actually, the Track EQ that is already on all Vegas audio tracks by default already has a [Sys] 60 Hz hum notch using four stacked filters preset. You just need to apply it if 60 cycle hum is the issue.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Ha!~! Love it!
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Jim
Don’t know if this is possible in your situation, but a technique I sometimes apply in crowded interview situations where there is background chatter/noise is to add a music track or audio loop and play it at low volume, not enough to drown out the speaker, but enough to mask the chatter, like they do on MTV. The same can be applied to mask humming.
It is possible to use a free tool called Audicity to invert the sound wave, effectively cancelling out the hum, but the side effect of such an action can be tinny sounding audio that remains.
Intel i7 920, 12GB RAM, ASUS P6T, Vegas Pro 10 (x32/x64), Windows 7 x64 Ultimate, Vegas Production Assistant 1.0, VASST Ultimate S Pro 4.1, Neat Video Pro 2.6
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I can add to that… if you have an audio editor like Sound Forge, you can pretty easily find the noise using a spectrum analyzer function. Look for a peak, usually in the low end (as many have suggested, 60Hz is really common in the US, 50Hz in Europe).
Use Sony’s “Track EQ” plug-in, or something like it. I like this one, becase it allows you to actually draw the band-stop (notch) filter than you like (set the type to “band”). You can slide the notch up and down using the “Frequency” slider, and set the bandwidth to ensure you get enough of the noise to hide it completely. If you’re also a Cakewalk/Sonar user, Cakewalk’s Parametric EQ is similar, but maybe a bit nicer at the GUI. NewBlue’s Paramertic EQ will do the job too, and has a nice enough sound, but I miss the graphical view.
I used this technique for just this purpose back in the early 1990s… my first digital camcorder, a small JVC model, had the annoying habit of recording motor noise when used with the internal mics. So I built a notch filter for that one sound, and it worked pretty well for years. This taught me the even more important lesson about camcorders — built-in mics stink. Use an external mic.
And don’t be cheap about it. I have over a dozen mics: dynamic, condensers (shotguns for camcorders, others for voice and instruments), even one ribbon mic. I have two Radio Shack mics… the purpose: those are the ones you hand to people who ought not to be trusted with a $500-$1000 microphone.
-Dave
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