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July 31st, 2007, 07:50 AM | #16 | |
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We also recorded (as we always do) a good 40 seconds of room tone, for each interview since we re-arranged the background. Had to tell people you can't talk AND you can't sniffle! OR snort! OR cough! OR fart! Don't breath for crissakes, you can do that later! I'm going to put up a sample of the audio for those interested, didn't get to it yesterday. |
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July 31st, 2007, 08:14 AM | #17 |
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I have Adobe Audition 2.0, and was playing around with the noise reduction. It didn't clean up the sound to my satisfaction, so I'm thinking we will just have to re-interview people.
I've seen a lot of references to SoundSoap - Would you guys say more effective than Audition? I've seen SoundSoap 2.1 and SoundSoap Pro on the Bias website. Quite a price difference - is SoundSoap Pro much better at noise reduction, anyone know? |
July 31st, 2007, 09:21 AM | #18 | |
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I've had pretty good success with the Sony Noise Reduction plug-in 2.x ( now part of Sound Forge 9 ) the past couple of years. If you could post a sample of your audio, I'll see what I can cook up. If I'm happy with it, I'll send you the results to check out. Yes, there's a big difference between the pro and non-pro versions, though I do most of my clean-up with the Sony NR tool because I find it easier to use ( in either Sound Forge or Vegas ) than the SSoap user interface. |
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July 31st, 2007, 09:43 AM | #19 | |
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July 31st, 2007, 06:23 PM | #20 |
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Here it is. It's about 60 seconds long, the first 30 seconds is just the room tone. The last 30 seconds is the person talking, of course.
http://www.catzillaproductions.com/Shared/Beth1.wav It's uncompressed from Premiere Pro, but it's only 10 MB. One channel is the lav, the other is the shotgun. Well, that's how it was recorded, I'm not sure if that's preserved in the export. |
July 31st, 2007, 07:31 PM | #21 |
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Once More with Feeling... :-)
Hi Dennis,
I took a quick stab at it using Sound Forge 9. Here is what I did to process your file: - Split the channels, and decided that the right channel ( probably your lav ) was more useable. - Ran DC Offset just in case. - Minus 21 dB RMS normalization - 3 and 4 passes with the Sony Noise Reduction plug-in. Made a noise print for each pass, then processed the audio at -6 dB in Mode 2. - Tried a little Paragraphic EQ at -5 dB at 4,825 Hz wide 2.5 octave to try to smooth out the midrange a bit. Here's a MediaFire link to check things out: http://www.mediafire.com/?4kqckzgz12l ...Let me know what you think. - Guy |
July 31st, 2007, 08:10 PM | #22 |
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Wow. That is awesome. I thought Beth1R_4pass.wav was best. I used the NR tool in Audition on that.
Comparing Before and After is pretty incredible. Bravo, sir! Bravo! I also know about mediafire now. I put my version (based on your version) here for you to listen - http://www.mediafire.com/?1sqjtb0ezby |
July 31st, 2007, 08:34 PM | #23 |
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Guy,
That Beth 1r 4 pass is great. Can you provide more details. I use Waves Restoration and it's common to get the artifacts like those heard in Dennis' version. A screen shot of your set-up would be helpful to correlate Sony's setting to Waves. Why RMS normalization? What is Sony's "Mode 2"? Why 6db under? The key must be the multiple passes with gentle NR each pass. Process time would take a while especially on large file, but the results are fantastic. Good Job. |
July 31st, 2007, 08:55 PM | #24 | |||
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Fun with NR Plug-ins...
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Also, it sounds like Audition is using a noise-gate which definitely helps to lower the noise floor, but I find it can draw attention to itself unless there's a music or ambience track to hide when the "noise floor drops out". ( i.e. Suddenly it's too quiet ) ...Well, I hope this helps to save you from a reshoot. It certainly looks possible to fix your noise in post. Cool stuff. - Guy |
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July 31st, 2007, 09:25 PM | #25 | ||||
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Root Mean Square Normalization, which is supposed to be a better representation of the overall "power" of the recorded sound file. I find that the standard Peak Normalization can sometimes really distort the volume of an audio file, unless you manually correct this afterwards. RMS Norm isn't perfect either, but I like it's effect more than Peak Norm. Sony's Noise Reduction 2.0 plug-in offers four modes of NR, which are essentially the strength of the NR effect. Mode 0 is brute-force, while Mode 3 can be quite gentle. Mode 2 is the default, which generally does a good job. I think of this like choosing coarse sandpaper versus a very fine sandpaper. The finer stuff often works better, but takes longer to get the job done. :-) This is the Noise Reduction effect in dB. You are less likely to "bork" an audio recording by correcting things in multiple passes, especially if you make a noise-print of the noise you are trying to get rid of with each pass. Remember the sandpaper thing? Quote:
Screenshots of the key SoundForge 9 Effects I Used http://www.mediafire.com/?ctvmtw4999j - Guy |
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July 31st, 2007, 11:01 PM | #26 |
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Thanks for the screen shot. So are you normalizing to RMS value to get the overall level up before you begin the the NR process? It is probably better than peak normalization since one spike can really throw they whole level off.
When you are sampling the noise how long is the sample? Typically I will use a fraction of a second. I know what you mean about the difficulty of how much processing to use. The temptation in the process, at least for me, is to try to go too far in one pass. This creates the distortion or mechanical sound.. I am going to play around with mutiple passes and see if I can get close to your incredible results. For fun I have included a Waves X-Noise screen shot. |
August 1st, 2007, 04:50 AM | #27 | |
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August 1st, 2007, 06:28 AM | #28 | |
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Would a smaller sample take out a smaller piece, so less destructive to the dialog? Then you take another tiny sample, apply NR, and repeat until you get to where you like it? |
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August 1st, 2007, 08:59 AM | #29 | |||||
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A lot prettier than Sound Forge, but I think that's a Mac thing. Most Mac apps seem to have better looking UIs. - Guy |
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August 1st, 2007, 10:12 AM | #30 | |
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Add one step - each time you take a noise sample you have some settings you can apply to the NR based on that particular capture. Doing multiple caps and filters is good technique, but you should have a light hand with the NR settings for each sample. Also, Sony NR offers a checkbox for "keep residual" This is worth selecting and listening to, as it will preview what's being thrown away. If you hear some voice-like sound either back off on the settings or take a new sample until you are hearing and throwing away noise only. (don't forget to uncheck "keep residual" when you're done!) One more note: Sony NR is a direct-x plugin that also appears in Vegas, and probably in other sound apps that use direct-x plugins (but I've only used it with Sound Forge & Vegas). |
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