Air Conditioner White Noise Reduction

Hi, it would be awesome if someone could follow this link and check out this short sample of interview footage. There is background noise from an AC system that I'm going to try and reduce.
If anyone has tips on which filters, settings/parameters, and methods might work best in this situation it would be much appreciated.
Cheers!
Luke
P.S. I'm relatively new to video production but I love it so much that I'm trying to make a go at it as a freelance career. I'll probably be posting a lot of questions in the coming months, and look forward to the time when I've accumulated more knowledge and can help others in this forum.

Luke,
I fear that you are going to spend an awful lot of time messing about with tools with which you are apparently somewhat unfamiliar and which, at best, will only marginally reduce the AC noise. There does appear to be a tonal component to the noise and you can use Soundtrack Pro the graphic EQ (in FCP) or the Parametric EQ filter (also in FCP) to find this tone and then reduce it, but your best shot, I'm afraid, is to reshoot this section if you want perfect sound.
I've been there.
Harry

Similar Messages

Why are there different specifications and SKUs on the same model window air conditioner?

Hello, The Best Buy website has a Frigidaire Home Comfort 12,000 BTU Window Air Conditioner - White Model: FFRE1233Q1 SKU: 6060171. In the Specifications next to "Energy Star Certified" it says "No" and doesn't show the EER. The picture of the unit shows an Energy Star emblem in the upper, right of the unit.
The website also has a Frigidaire Home Comfort 12,000 BTU Air Conditioner - White Model: FFRE1233Q1 SKU: 8274079. It also states in the Specifications next to "Energy Star Certified": "No" yet shows the EER as 11.3. The picture of the unit also shows an Energy Star emblem in the upper, right of the unit. Both units are in the section "Best Buy/ Appliances/ Heating, Cooling & Air Quality/ Air Conditioners/ Window Air Conditioners/ Product Info".
The Frigidaire website shows a Frigidaire 12,000 BTU Window-Mounted Room Air Conditioner FFRE1233Q1 and states Energy Star Certified": "Yes" and says the EER is 11.3. The picture they show looks to me like the same picture on both pages I've referenced on the Best Buy website and also shows an Energy Star emblem in the upper, right of the unit.
Can you possibly tell me what the difference is between the 2 units on the Best Buy website and the Model FFRE1233Q1 on the Frigidaire website? Thank you.

Hello agreatcompany,
This is certainly bizarre! To my knowledge, it seems that these are the exact same unit, so there wouldn't be any differences. It is possible we were doing some modifications to the information on this unit, and ended up changing the SKU, causing 2 to exist, which may explain why you were able to see both on BestBuy.com at one point. Presently, it would seem the only SKU available on BestBuy.com would be SKU 8274079.
In regards to the specifications, we receive all of the information from the vendor. With that said, I do see that this model appears to be Energy Star Certified according to Frigidaire's site, yet we do not have it listed as such. Please know that I am bringing this issue to the attention of the appropriate teams to have it reviewed, and any errors corrected.
If I should be provided any alternate information in regards to the two SKUs, please know that I will update you right away! If you should have any questions, please let me know.
Regards,
Tasha|Social Media Specialist | Best Buy® Corporate
Private Message

How do I permanantly apply audio noise reduction in FCP X

I have a clip shot on a blue screen set that had some noise in the background (constant hum from air conditioner). The Background Noise Reduction in FCP X, applied at 100%, does a truly amazing job. But there is one huge problem. It appears that FCP X "learns" as the clip is played, perhaps taking it's own noise print of the background noise, and applying it on the fly. Because for every clip I apply 100% background noise reduction to, that clip begins playing and you hear the full audio with noise. After a few seconds the backgroun noise begins to fade away. After playing for about 5 seconds, the background noise is completely gone. And it's freaking amazing. Better than what I've ever been able to accomplish with Soundsoap or other programs. But the fact that it must do this on the fly each time means it is unusable to me. I can't have each clip in my timeline start with noise, then have the noise drop out after a few seconds. Is this a bug? Am I doing this wrong? There are really no settings. You either have Background Noise Reduction on or off and set your percentages.
I am fixing audio on a 1 hour program. Really need this to work. Anyone else having the same problem, or found a solution? Or know what I might be doing wrong?
Paul

Paul Kakert wrote:
The Background Noise Reduction in FCP X, applied at 100%, does a truly amazing job.
Does this mean you actually like the audio to sound as though it was recorded under water? I guess it depends on the amount of noise that requires removing, but I've never been able to tolerate more than about 40% before the audio gets horribly distorted.
I really don't share your experience of FCP X removing background noise 'on the fly' (sorry).
Andy

Noise reduction doesn't work?

Hi All,
New user here (testing the demo). I have a moderately loud
air conditioner system, and as a result there is a constant hum.
I'm trying to get the noise reduction to work, but to no avail.
Here's what I do.
I record a clip. then select Edit Timing. Then Adjust Volume.
Then check "Dynamics (boost quiet sections), then I play with the
Noise Threshold and Ratio sliders (primarily Noise Threshold).
These don't seem to do anything, though I *can* adjust the volume
of the clip successfully.
What am I doing wrong here? Thanks!

Hi carloshl
Welcome to the world of Captivate!
Seriously, the audio editing bundled inside Captivate is
always reported as being rather anemic. I compare it to the jack in
the trunk of a new car. Enough to change the tire once in a while,
but if I'm gonna do it more often than that, I should probably
invest in a different tool.
The really super good news here is that your investment need
not be cash! There is a wonderful and totally free audio editor out
there called Audacity. You may download it by
clicking this magickal
link.
Oh, and you should probably also find a quieter room to
record in.
Any possibility of turning off the air for a brief
period?
Cheers... Rick

Noise reduction on track1 using noise print from track2

I have an audio track from a video project that was recorded on track1 that has a lot of interference from the wirelss mic that was so strong that it crossed over to the idle track2. Track1 has the voice and interference intermixed. Track2 just has the interference. How can I take a noise print from track2 and use it to reduce the corresponding noise on track1? Any ideas?

Bristol87 wrote:
In addition, to make the process more challenging, I am unable to get the audio in the edit frame to play at the same gain as in the multi-track frame. In edit mode I seem to be at a 0db gain whereas the multi-track is playing at over 12 to 20db.
I am also unclear how to get the changes back to Final Cut. When I go to File to save it I do not see a Save option that would transfer the edited audio back to the Final Cut Project.
For the additional items you mention:
1. In your multi-track project, check your volume envelopes on the track, and check the level on your submix and master. To do this, click the the disclosure triangle just left of the track name. You'll see in purple the envelopes section, which is like keyframes in FCP.
2. You have to export a mix to send it back to FCP. Go to File -> Export, save the master mix with a file name, and most likely as an aiff file, then in the dropdown "After Export" choose "Send to Final Cut Pro Sequence."
For your noise reduction questions - applying noise reduction is for broadband, sustained noise, like an air conditioner or a hum. Are you trying to apply the same noise reduction to several files because they have the same type of background noise? I generally just save my settings, but set a new noise print for each file. I'll give you a quick step by step:
Select a bit in the file where there's JUST noise. Then go to Process -> Noise Reduction -> Set Noise Print. Then select the entire file, and go to Process -> Noise Reduction -> Reduce Noise. When the noise reduction window comes up, you just need to listen and play with the settings until you're satisfied with how it sounds. As a starting point, take a look at the level of the noise alone, and use that as the threshold. Usually 100% noise reduction doesn't sound good, but you just have to use some trial and error. Too much sounds worse than too little, in my opinion. When satisfied, apply it and save the preset.
Hope this helps!
Matthew

Background Traffic Noise Reduction

Hello all,
I'm currently editing my short film and I have huge issues with background traffic. I've faught with Adobe Audition for about 2 hours now and I can't get a good reduction on my background traffic. I've used adaptive noise reduction and Noise reduction (Process) and I just can't seem to get a decent reduction without having weird noises that would just make everything worse.
If you want you can listen to it for yourself, I'm linking it with dropbox.The beginning is the worst I have plenty of other audio that has more backgrounf traffic.
Thank you in advance for you help! Cheers!

I couldn't find a link to your Drop Box but I can make a few general comments.
First, traffic noise is going to be very difficult to work on because it's constantly changing. Noise reduction is most effective on things like electronic hiss or an air conditioner running continuously in the background.
However, to give yourself the best chance, use the Noise Reduction (Process) version. Grab a sample of the background noise but don't try to get rid of all the noise at once. Do a very light reduction, grab another noise sample, then do another light process. Keep this up until you hit the best compromise between background noise and the sort of artefacts you've noticed. Depending on exactly what the noise is, you may find that increasing the FFT size helps.
Because the background will be constantly changing, you MAY find you get better results by breaking it up into smaller chunks with more similar noise problems....general traffic is different from a passing bus.
Which leads me to a final suggestion...if certain noises are a fairly specific frequency, instead of using NR, you might try to go to spectral view and use the marquee tool to draw around the offending frequency and either just hit delete or maybe the spot healing tool. This'll only work with a narrow frequency band--I was once able to remove a passing ambulance siren almost totally using this method--but a passing truck rumbling through a wide range of frequencies wouldn't really work.
Finally, you might find that some subtle boost in the fundamental voice frequencies might help your intelligibility a bit. You'll have to play with frequencies to find the right ones but they'll be in the mids somewhere.

Noise reduction feature

Hi,
I am working with Soundtrack Pro 1.1 and was wondering about the noise reduction feature. Is it useful? I shot a feature film that contains a lot of unwanted background noise like moving cars, chain saws and so forth. Will this built-in feature be able to bring some of the audio up to spec?
Chris

It is good for removing consistent, perpetual background noise. This means room noise from an air conditioner, and other kinds of consistent ambience. It doesn't help much with things that happen in the background at certain times, but not throughout, such as cars and bird chirps.
For things like cars and incidental background noises that are not perpetual, carefull EQ, Compression and Adaptive Limiting and Noise Gating are your best option. And, of course using your sound levels on the offending tracks helps.
The best way to deal with them is with careful mic positioning in the first place. Shotgun mics help with this as well as the use of lav mics. The closer your mic is to the person, the louder they will be in relation to the other noise in the room (which includes the person's echo off the walls).

Noise reduction did nothing - no instructions for the process

I entered noise reducer in the help menu and "what's new in imovie comes up" - I am looking for info on the process to apply noise reduction and nothing applied even two layers down in what came up in "what's new in imovie".
I have bought the book iMovie HD 6 & iDVD 6 and it does not give direction on how to apply. It does say page on 157, "this effect minimizes white noise, crowd noise, and hum - but nothing else - no directions on how to apply!
My audio clip is selected in the time line and if it is as simple as selecting the apply button in audiofx, then select noise reduction, then select apply - IT DID NOTHING.
Is this how it works for application and out come?
Can anyone help,
jim

No, but the Help menu in iMovie does:
To add an audio effect:
Click the Timeline Viewer button (shown above).
Select the audio clip or clips you want to add an effect to.
Tip: To learn how to select multiple clips, see "Selecting clips" below.
Click the Editing button, and then click Audio FX at the top of the Editing pane.
Select the audio effect you want from the effects list.
Adjust the settings for the effect.
Different controls appear depending on the effect you select. For example, if you select Reverb, you can adjust the intensity of the reverberation by choosing a reverb style and dragging the Less/More slider.
Click Preview to hear the effect.
To stop previewing the effect, click Preview again.
If necessary, repeat any of the above steps until you have the effect the way you want it.
To add the effect to your selected clips, click Apply.
When you add an audio effect to a video clip, iMovie automatically extracts the audio from the clip. The extracted audio with the applied effect appears as a separate clip in one of the audio tracks in the timeline viewer. If you want to add multiple audio effects to the same portion of video, be sure to select the extracted audio clip to add the additional effects to.

Wind Noise Reduction

I'm using PPCS3 for a project and have a video interview piece that was shot outside. The subject was wearing a lav mic with a windscreen on it, but there is still a considerable amount of wind noise coming through. Can anyone suggest a way to at least reduce the wind noise without reducing the vocal quality too badly? I have the entire CS3 suite, so Soundbooth is also available to me.
Thank you in advance for your help.
-Ken

Hi there Bill, or anyone else that could help,
I too have a wind problem!
I'm using CS6 Master Collection, pretty new to everything so please go easy.
I have a fair bit of open air footage with a huge amount of wind noise. I have played with the Noise Reduction effect in Audition (as there doesn't seem to be Soundbooth any longer?) but i have literally 'played', i mean i don't really know what i am doing. It doesn't seem to reduce the wind noise more just all noises, which obviously isn't that helpful.
Are you able to give me any help, point me in the direction of a tutorial, or better yet if you know a program / plug in that really gets to grips with wind noise?
It seems that most of the time people are wanting to use noise reduction to get rid of a constant, set noise like a hiss but wind noise is totally different as it’s a very dynamic noise, constantly changing so you can’t 'sample' a section as the next section might sound different but is still just as unwanted.
Thanks for any help anyone can offer.

LR3: lack of processing feedback after applying noise reduction

Now with the bigger RAW files (7D's 18Mpix) Lightroom is becoming really slow.
On several ocassions after applying some noise reduction, and waiting for some 20-30sec for a visible result, I moved the slider back and forth in the wrong assumption that nothing happens, but in fact I was disrupting an ongoing operation. The problem in LR3 is that it does not show any of its tooltips with an information that a noise reducing operation is in progress.
I hope that the team would improve this in the next version 3.01, we need at least the tooltip to appear.
Thomas

i absolutely agree!
Now, in LR3 you can move the sliders very smoothly - but nothing happens for seconds.
Same happens with the local adjustment brush. You click on the picture and start to paint but nothing happens. After a few seconds the pin appears and MAYBE the first click for the mask is set. After that you can paint further.
Another thing is, that it takes longer for a RAW to be loaded. Sometimes i see the "Loading"-Hint for 10 Seconds or more. If i need to scan fast thru hundreds of pictures to clone away some things or make a face a little bit brighter, these loading times feels like ages.
Both is very annoying and was better in LR2.
BTW: I think LR3 has a serious memory leak because i can see LR3 slowing down over time. After developing about 20 pictures everything slows down, sometimes to a point where i think LR3 has frozen (no CPU usages, just standing still for 30 seconds or more). When i quit and restart LR3, everything is quick until the next slow down.
(older iMac 24", white model, 3GB RAM that can be used) - you may see this at a later point if you have 8GB or more RAM of course.

Simple noise reduction technic for hard drives

For those of you who are fussy about the noise a HD makes, as I am, a simple solution to reduce or even eliminate it is to stick a small piece of putty on the thin metal cover of the HD. That cover tends to act as a sounding board for the "white noise" that is generated by the moving air inside. A piece of putty about the size and shape of a nickel or quarter placed about where the center of the platters underneath would be can pretty much kill that noise. The thin metal piece can no longer resonate or vibrate at any frequency to speak of.
I use a black putty designed as a weather sealant. It is very sticky, like tape, and will not fall off. Plumbers putty will fall off in time I am sure.

Oh sure. You just have to keep in mind who owns the machine and what its purpose is.
In my case I own it and its purpose is for my enjoyment. For another person they may only be using it (company owned for instance) and/or it may be more utilitarian rather than recreational.

Noise reduction on almost chroma key edges

I have a footage of a person in a white tee shirt in front of a very intense bright yellow backgroung (It looks like a chroma-key).
On the edges of the person and specialy on the edges of the white tee shirts (that is a over-exposed) there is some noise / artefacts.
I desaturated in FCP with the 3 way filter for the yellow to get less intense.
I checked plugins sites like: Natress, CHV, Kurt Hennrich and revisionfx and they have noise reduction plugins.
But I was wandering if anyone knows what's the best plugin (or filter) for this kind of noisy / artefact edges problem ?
Also, is there any setting in Compressor that could help to reduce this ?
I filmed on DVCAM NTSC, and this is for a DVD (replications).
Thanks.

Wow, you've got a bunch of problems here starting with your camera of choice which I'm assuming since it was DVCAM, was something like a PD150/170, the choice of video format which is extremely compressed, the exposure.
I think your main issue stems from video format and exposure, however. Depending upon the camera model, you probably should dial down your chroma settings and for something like this, I may have been inclined to under-expose a bit.
There is a very good reason that good lenses cost as much as cars or houses. Cheap cameras with cheap lensing exhibit a bit of chromatic aberration which you've also got going on. http://en.wikipedia.org/wiki/Chromatic_aberration
Your best solution would be to reshoot with a more robust video format if possible. You can try creating an edge matte for the yellow background and applying a light blur/defocus to the edge matte.
If Goggi comes up with a suitable solution be sure to post the details for future readers.

EXS24 White noise on Piano Samples

I am experiencing a light air-brake-release type sound when triggering or releasing samples on Sampletekk Black Grand Piano Close banks. I think some call it white noise or digital noise. It happens more at times than others, usually with bigger chords. Latency and maximum note settings don't seem to affect it. Suggestions?

There is one or more corruptes samples in your Sampletekk Black Grand Piano Close...
talk with Sampletekk support.
G

Allow integration of Noise-Reduction plug-ins to ACR

My experience is that the noise reduction plug-ins like Neat-Image, NoiseNinja, etc. are significantly better than NR in ACR 5.x. The marketing material about LR-3 (ACR-6) touts that NR is better, that my limited experience with the LR-3-beta is that its NR is stll underwhelming.
My budget is limited ... it stung to spend big bucks on CS4, then about $70 on Neat Image 6.1 because ACR 5.x NR was, IMO, inadequate.
I'm not an ACR/CS4 expert, but my impression with high ISO pictures is that you want to do sharpening near the end of the workflow, especially after NR. I would like to use the much improved sharpening (and Clarity) that is available in ACR 5.x, but that detracts from the effectiveness of the NR plug-in, especially for high-ISO pictures. It doesn't seem to matter that much with low-ISO DSLR images.
I would appreciate the Adobe PS team working with the the NR plug-in vendors to give them a "hook" into the ACR pipeline. Their plug-in would be invoked by the ACR "engine" at the appropriate point in the pipeline, perhaps very early even before White-Balance and exposure/brighness/contrast adjustments.
In a batch of "sync-all", my impression is that you want NR to act on the "raw - raw" image before any exposure or contrast adjustments. When you increase exposure for an underexposed image, the shadows becomre noiser, and this can throw off pre-built noise profiles (as least that is my experience with Neat-Image 6.1).
My preference is to do as much of the Post-Processing as possible in ACR for images that don't need layers. That way I can minimize use of PS when appropriate. At this time, I find myselft invoking PS for all images to do NR.
But perhaps I'm mis-informed (wouldnt' be be first or last). I've had email correspondence with the Neat-Image support person (also may the be developer?), and my understanding is that such as "hook" isn't available.
Of course, the really preferred suggestion would be for ACR to have as good or better NR as the plug-ins, but until then, it would be appreciated for Adobe CS4 to be more "plug-in friendly".

My experience is that the noise reduction plug-ins like Neat-Image, NoiseNinja, etc. are significantly better than NR in ACR 5.x. The marketing material about LR-3 (ACR-6) touts that NR is better, that my limited experience with the LR-3-beta is that its NR is stll underwhelming.
My budget is limited ... it stung to spend big bucks on CS4, then about $70 on Neat Image 6.1 because ACR 5.x NR was, IMO, inadequate.
I'm not an ACR/CS4 expert, but my impression with high ISO pictures is that you want to do sharpening near the end of the workflow, especially after NR. I would like to use the much improved sharpening (and Clarity) that is available in ACR 5.x, but that detracts from the effectiveness of the NR plug-in, especially for high-ISO pictures. It doesn't seem to matter that much with low-ISO DSLR images.
I would appreciate the Adobe PS team working with the the NR plug-in vendors to give them a "hook" into the ACR pipeline. Their plug-in would be invoked by the ACR "engine" at the appropriate point in the pipeline, perhaps very early even before White-Balance and exposure/brighness/contrast adjustments.
In a batch of "sync-all", my impression is that you want NR to act on the "raw - raw" image before any exposure or contrast adjustments. When you increase exposure for an underexposed image, the shadows becomre noiser, and this can throw off pre-built noise profiles (as least that is my experience with Neat-Image 6.1).
My preference is to do as much of the Post-Processing as possible in ACR for images that don't need layers. That way I can minimize use of PS when appropriate. At this time, I find myselft invoking PS for all images to do NR.
But perhaps I'm mis-informed (wouldnt' be be first or last). I've had email correspondence with the Neat-Image support person (also may the be developer?), and my understanding is that such as "hook" isn't available.
Of course, the really preferred suggestion would be for ACR to have as good or better NR as the plug-ins, but until then, it would be appreciated for Adobe CS4 to be more "plug-in friendly".

I have some dts cd's that I want to import into itunes on a windows pc and then play back on my apple tv 3 (i think its 3, about 9 months old) to listen to through my onkyo amp via hdmi as dts, when I play back I just get white noise.

I have some dts cd's that I want to import into itunes on a windows pc and then play back on my apple tv 3 (i think its 3, about 9 months old) to listen to through my onkyo amp via hdmi as dts, when I play back I just get white noise. I have seen lots of old posts which go on about converting files but am wondering wherher at the current time with the latest versions of itunes and apple tv whether this should by now be a virtual play out of the box solution.
I have tried connecting my atv to the amp by optical cable but that didnt produce anything better and am assuming that a hdmi cable should be able to reproduce everything an optical cable does.
Is this something I should be able to achieve without having to recode the files?
Tracks are imported to itunes as apple lossless, have tried setting the atv audio settings to auto and 16 bit, neither works yet I was told some time ago by an apple rep that the atv shoud be able to handle any type of audio as it just passes it to the amp to decode. I am not stupid but not that technical when it comes to audio and bitrates etc so any explaination would be appreciated.
Thanks in advance for any help

Willy, the procdedure you describe works perfectly for AppleTV G1. In fact, I frequently play DTS music discs ripped to my iTunes library as Apple Lossless (ALAC) and synched to the ATV. What happens is that, as far as iTunes and the ATV are concerned, a conventional stereo 16/44 audio file is being played; however my reciever detects the DTS data stream, and instead of outputting static, it decodes the 5.1 channels correctly. This process parallels the way DTS discs were designed to be played back: a conventional CD player is connceted, via digital out, to a DTS-aware reciever/pre-amp and the two channels of static are recognized as 6 channels of DTS-encoded audio.
However this process will only work if the player (CD, ATV, PC, etc.) sends a "bit-perfect" 16 bit/44.1 khz data stream to the decoding device. In the case of ATV G2 and G3, as has been discussed elsewhere, the unit resmaples all audio - including 16/44 PCM (Redbook CD) - to 16/48. While this is not a big deal for conventional audio CDs, MP3s, and AAC files, it mangles the fragile DTS datastream and renders it undecodable. The resulting static that you hear is just like the static you would hear if you played a DTS CD on a non-DTS capable system.
Sadly, I'm not aware of any easy way around this. You could use a program like Foobar (and the DTS plugin) to convert your DTS CDs to 6-ch .wav or .flac file. From there you could transcode the file to AC-3 and then mux it into a video container that ATV supports. You may need add a dummy video track, for iTunes/AppleTV to be ok with the file, though I'm not sure. This may be a lot of work.
Sorry for the bad news. I wish that the iTunes/ATV ecosystem had better multi-channel audio support.
Steven

Air Conditioner White Noise Reduction

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