Eliminate crowd noise

Does anyone have a simple method to try and reduce crowd noise. I have 5 second thank you clips for a church that someone shot with a very generic camera. Ive tried some time back to reduce wind noise by setting a filter and having STP eliminate that noise.
Must I do the same process to remove crowd noise?
thanks for reading

neverminds, i found a decent method, it isnt perfect
setting noise prints and tweaking sliders. hope some other peeps needed this info
would be nice if the gent used a some sort of mic, but it was a on the go thing they did

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What is best filter to decrease crowd noise from background of live band recording?

I have a video of live musicians, the camera picked up more of the ambient crowd noise than I had expected. Does anyone know of a good track effect that would reduce the crowd noise without compromising the music quality?
Thanks,
Sam

Since noise tends to have a very broad frequency spectrum, I don't see good chances to reduce the noise without affecting the music.

HOW TO TURN OFF NAP TO ELIMINATE WHITE NOISE?

RE: HOW TO TURN OFF NAP TO ELIMINATE WHITE NOISE
Ive discovered that when ever I attempt to record audio in Logic pro 8 I get a constant white noise in the back ground. I've seen proevious posts regarding this and have downloaded the xcode developer tools but cant find the right path to locate the "nap disbale" option. I'm using a mac pro intel 10.6.8 [snow leopard] please advice as I am going out of my mind!!...thanks

There is a forum devoted to Logic Pro you might want to ask there.

How to eliminate the noise from the stepper motor

I’m using stepper motors to move a traverse on which a hot-wire anemometer probe is mounted. When the stepper motors are turned on, they induce noise on the analog signal of the hotwire anemometer, or of any other transducer, at multiples of 120Hz.
The stepper drives are P41 Series made by American Precision Inc. The P41 Series contains a power supply, a motor drive and a logic controller. The logic controller inputs are optically isolated and utilize the 5 VDC supplied internally by the drive.
An NI 6251 or NI 6024E DAQ card is used with LabVIEW to send digital output signal to the logic controller in order to step the motors.
The AI input channels of either NI 6251 or NI 6024E DAQ cards and LabVIEW are used to acquire the signal of the hot-wire anemometer. Different DAQ cards are used for the data acquisition and the stepper motor control and the noise is transferred through the laptop to the data acquisition card (analog signal).
All cables are shielded and the noise was confirmed to be conductive and not radiative.
There was no difference when measuring the analog signal with Differential or RSE.
As a test, the leads from to the drive’s logic controller were connected to the AI input channels in order to check the magnitude and frequency of the noise flowing to the DAQ card and were found to be 5 V peak-to-peak at 60 Hz.
Please let me know if you have an idea on how to eliminate this noise.

It sounds like you have a ground loop issue. If possible, try totally isolating the stepper controller from the data acquistion AI more than you already have. This could include any of the following:
Ensure the optoisolation on the control lines fully separates the power and ground of the digital output and stepper input.
Use different grounds for the stepper power supply and the DAQ power supply/computer. Isolation transformers can help here.
Use lower inductance lines for the stepper controller. This will reduce the movement of the ground.
I suspect you have probably been over the above, so you are left with filtering the noise out of the signal. Since it has high harmonic content, a simple low-pass is unlikely to work well. Your best bet is probably to characterize it and use some sort of Fourier filtering. If the relative sizes of the harmonics are always the same, you can take the Fourier transform, find the height of the fundamental, use this to calculate the sizes of the harmonics, delete them from the Fourier transform, and do an inverse Fourier transform to recover your signal. Alternately, you can use a series of narrowband filters to remove the noise, although this will also remove any signal at the same frequencies. It is better if you can improve your circuitry to remove the noise.
Good luck. Let us know if we can help you more.
This account is no longer active. Contact ShadesOfGray for current posts and information.

Best way to remove crowd noise in an interview

If any one knows the best way to take out or reduce background crowd noise in either soundtrack pro or FCP that would be great. I am kinda a novice with soundtrack pro so if you could dumb down the directions that would be great.
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Reduce Crowd Noise

Can anyone point me to a tutorial on removing crowd noise.
I recorded my brother;s band at a band and would like to reduce crowd volume.
I know it's not possible to completely cut it out because it will share the same frequencies, but maybe it can be reduced??

Use mics with better off-axis rejection next time you shoot? Or better yet, get a board feed and mix it with the camera nat.
As for what you're already shot, my feeling is that whatever you try will adversely affect the music, which has such a broad bandwidth. If it were just one guy speaking to the crowd, that'd be different. But music...

Reduce or eliminate background noise

I have seen this issue touched upon in other forums, but really need a straightforward answer to this question as we are working on a project for a school teacher that is retiring, and want to give her a good memory to take with her. Unfortunately, when the person taking the video was doing it, they did it near screaming children. So we have interviews with students that we can barely hear due to the background noise. (We are on a tight deadline so a second take is not an option).
The question is: step-by-step using iMovie HD 06, can we reduce the background noise so that we can eliminate or reduce the screaming children in the background, and keep the sound of the child that is speaking?
If this can be accomplished by the equalizer, again please provide pretty specific instructions, as I can be dense at time.
I can raise the volume on the soundtrack, but that seems to make both the child's voice louder and the background noise louder.
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Thanks in advance.
Russell

Hi
As Karsten writes.
There are no magic audio program that can differ sound You want from sound You don't.
As I learned from TV-broadcasting. Most TV-programs are dubbed. Original audio
out and playback audio added.
Yes all text has to be lip-sync-read one more time. Tedious but this is how
some in Street talks are done. (You don't hear a car although You see them)
BUT: With expert microphone tech. Special mic which has to be mouth close placed and
a very narrow uptake much can be done - but most often by Pro-people.
Yours Bengt W

How do I eliminate background noise from a recording?

I loaded an audiotape from a cassette to my MacBook. There is too much background noise and I don't know how to get rid of it. Is it possible? Thanks, Miriam

One option is to use the (free) Audacity. Just load the mp3 or aiff and follow the instructions to construct a noise profile and then get rid of the background noise. Once that is done, one can reimport the file into iMovie, if you choose.
Export the file from iMovie 09 as mp3 or aiff file. Import into Audacity. Get rid of the noise. Export from Audacity as a mp3 or aiff file, and use that as you like.
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Hugh

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Hello. I'm working on a tight budget and using a bottom of the range microphone. It may even be less advanced than the one built-in to the Macbook. I've managed to get rid of a little background fuzz by cutting out the highest and lowest frequencies, but it's still unlistenable with just guitar and voice. Does anyone have some tips for improving the quality without overly affecting the sound? Thanks a lot, I'd really appreciate if anyone could help, this has been bothering me for a while now.

I think you are starting out on the right track by adjusting the EQ, but I would suggest playing around with compression and gate on each track. You may be able to use the gate plugins to squeeze out background noise and hum on each of your tracks. That might steer you in the right direction.

Eliminate "Fan" Noise When Recording

I am brand new to Logic Pro, like just installed it an hour ago. Could anyone direct me in the menus to the place I need to go to be able to record without that background noise?

Harry Katz wrote:
I am brand new to Logic Pro, like just installed it an hour ago. Could anyone direct me in the menus to the place I need to go to be able to record without that background noise?
Turn off the fan.
Oh, but if it is the fan from your computer, you need to isolate it from your microphone.
Welcome to recording with a microphone 101, where the microphone shows you what sounds are ACTUALLY in your room, and how your brain tunes most of them out.
1.- How big is your room?
2.- Can you place the mic so it's null point is directed at the fan noise source, so it does not pick up as much of it? (If you do not know what a null point of a microphone is, you really ought to pick up a basic recording book at your local bookseller).
Cheers

Line mic noise preamp USB hiss eliminate how?

Setup: Garageband 08, Tube MP ART project Series USB preamp, and a professional-grade non-powered ribbon mic. There is a dedicated booth for the mic.
The preamp gain needs to be turned way up to get an acceptable but seemingly-low recording level from the mic into GB.
So the preamp is set at +35dB gain (max is +45dB) and the optional gain booster of +20d is enabled. The preamp functions Impedance, Filter, Phantom, Limit, and Phase are disabled. (I know that Phantom power should not be used with the mic I have.) High quality shielded mic cable.
On playback, I can here a noticeable difference - there is silence between the gaps of spoken words - there is "noise" under the spoken parts. It is not room noise.
I can use Bias' SoundSoap (or play with the Noise Gate plugins I have installed) but to totally eliminate the noise, both the above effects muffle the sound and it can also sound out of phase.
How can I maintain a clear recorded voice that does not have that noticeable difference between the gaps of the spoken parts?
There's so much information out there yet I can't find an answer for non-technies.

**** wrote:
Well lowering your input impedance should help sonically with a ribbon but...
The button on the preamp is set on "high".
The mic specs says the mic impedance is <=200 ohms
<div class="jive-quote">But what puzzles me is this:
{quote:title=yattaman wrote:}On playback, I can here a noticeable difference - there is silence between the gaps of spoken words - there is "noise" under the spoken parts. It is not room noise.{quote}
Do you have a way to use another interface?
Only this preamp. Is the trouble with the USB Codec? I think I once saw a way to bypass the USB Audio Codec used by the preamp, and instead use the Mac "line in" setting while still using the preamp. Change the settings in the Sound Preference pane and/or Audio-MIDI Setup? Also, regarding Audio-MIDI Setup, no matter what I try, cannot make the 48000 setting stay enabled in Audio-MIDI Setup on the left side. It always reverts to 44000. I saw a thread here about it a year ago, and I guess this was never solved.
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The Nady manual (from here: http://www.nady.com/RSM4micspg.html) says phantom power will destroy the ribbon in this mic.)
How about this:
I decrease the preamp mic gain, and increase recording level in GB. And, can you confirm how to increase the recording level in GB? :-|

FM transmitor Car kit back noise pble

I bought the Tunecast Auto for Ipo from Belkin (according to the vendor, the best one on the market). When I play music on one frequency I always have some back noise which is very annoying when listening classical music ! Also, seems like the sound output is far less than normal CD in the car. I have to increase the volume by at least 30%. Any poossibility to increase the output or make all the songs sound with the same level. And of course, how to reduce this noise (looks like I have a bad tape without Dolby !!)
Thanks

I don't have one of these for my iPod, but i do have a Sirius receiver that transmits via FM.
There IS a volume loss, and I have found no way to fix it. I think it's just degredation based on a low power FM transmitter.
The same goes for the background noise. You are using low power FM frequency to transmit to a station that could have another transmission near it on the dial. This would cause your background noise. You would need to find a completely DEAD frequency, with no other stations next to it to totally eliminate background noise. Good luck finding that on the crowded FM dial.
the only way to get really good sound would be to have a AUX interface installed in your car. Places like Circuit City can do this if there is an interface compatible with your car head unit.
Good luck and happy listening.
EDIT: I see you are in Hong Kong...you most likely don't have Circuit City Try any electronics store, they should be able to tell you if your car stereo has a compatible AUX interface.
Message was edited by: MCOJerry

Suggestions for removing video noise from converted Hi8 footage

I am about to start capturing Hi8 material into FCP 6 through a Sony D8 camcorder that does the analog to digital conversion. Even after cleaning the tape heads, I notice a very few lines of noise at the very bottom of the frames - like a dirty head. From the camcorder side everything looks normal - no noise. From the FCP side in VTR mode you can see the noise. I am not sure if this is an artifact from the analog to digital transfer or if the tape head is still dirty.
Question: assuming I cannot eliminate the noise on transfer/input, is there an easy way to apply a universal filter or horizontal "clip" function to imported video to remove the bottom few lines of video? I guess I could always overlay a black canvas covering only a few lines on the bottom, but maybe there is a more elegant solution?
Thanks in advance for any counsel!

What you are seeing are timing errors that are an artifact of analog recording and generally are outside the viewable area of a CRT TV (i.e. in the overscan zone). If you are setting these up for digital presentation - web or computer play only, these items may be seen.
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• Recapture the material using a Hi8 deck and a separate analog/DV converter with a full frame Time Base Corrector between the tape machine and the analog/DV converter. This will clean up the timing errors but is an expensive proposition.
• Crop the image. This will leave a very slight letterbox effect and may not be noticeable unless you mix the material with non-cropped material.
• Slightly enlarge the material so that the tearing falls outside of the 720x480 area. Expanding images much beyond 110% softens/pixelates the images noticeably and my not be acceptable.
• Live with it.
Good luck.
x

Using a 9- to 4-pin adapter / firewire noise

Whenever I record an instrument with a pickup, I get a wind-up sound every few minutes; a high-pitched whine that I can only assume is from one of my hard drives. I know that the sound isn't coming from being in close proximity to the internal HD.
I heard from a friend that it may be possible to eliminate this noise by using a 4-pin firewire connector (since it doesn't carry voltage, only data). This is assuming, of course, that the motor-sound is coming through the voltage-carrying wires in the cable.
All of my drives are powered by their own adapters, not by the f/w buss.
Anybody know anything about this?

Jon H. wrote:
Whenever I record an instrument with a pickup, I get a wind-up sound every few minutes; a high-pitched whine that I can only assume is from one of my hard drives. I know that the sound isn't coming from being in close proximity to the internal HD.
I heard from a friend that it may be possible to eliminate this noise by using a 4-pin firewire connector (since it doesn't carry voltage, only data). This is assuming, of course, that the motor-sound is coming through the voltage-carrying wires in the cable.
All of my drives are powered by their own adapters, not by the f/w buss.
Anybody know anything about this?
There are some drives out there that have their chassis ground connected to the FireWire cable ground.
You have one of these drives.
You need to replace with another hard drive that does not do this.
Cheers

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Importing from VHS to iMovie11 using a digital converter: Director's Cut, I get fine video, but "motor" sounds overlaying the audio. How do I eliminate the noise?

Hi
And the "Motor sound" is from where ?
• VHS-recorder
• on original VHS-tapes
I use a Canopus ADVC-300 (Grass Valley ADVC-300 now a days) - and I do not have this problem.
If it is in the recording - then it will be extremely hard to deal with - near to impossibly.
You can try to separate the audio and try to clean it up in an Audio Editor. I would especially try to use "Sound Soap™ as it can do rather extreme cleaning up.
I got it by buying Roxio Toast™ 10 Pro bundle incl BD-component (now Roxio Toast™ 11 Pro bundle incl BD-component) and found this to be of great valu to me.
• Spin Doctor was great for old LP/EPs
• FotoMagico - for making very nice SlideShows
• Toast™ - to burn and back convert DVDs
and so on
Yours Bengt W

Eliminate crowd noise

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