Ac adapter noise

i recently noticed my ac adapter making a beeping/humming noise that i have never heard before. at first i thought it was my hdd but then i noticed it when i pluged it in.my laptop is a cq50 210us that i got in november with the included charger and battery. i have read different things on various fourms ranging from the noise being normal for chargers to people saying that it could be the battery is going to fail. i am looking for a straight answer for what this sound is. if anyone could help me it would be greatly appreciated.

Hi,
It's normal.
** Say thanks by clicking the "Thumb up" icon which is on the left. **
** Make it easier for other people to find solutions, by marking my answer with "Accept as Solution" if it solves your issue. **

Similar Messages

Audition CS6 crashes while running Adaptive Noise Reduction

Hi everyone!
So that is the problem, I edit an audio file, run Adaptive Noise Reduction filter, and somewhere during the processing the computer just crashes. Sometimes it happens and sometimes not. I saw that computer showes up an alert message just before the crash but I wasn't fast enough to read what was written there. Recently I did a clean system install and have just some programs installed. Before system reinstall the problem was not there, although the program (audition) is exactly the same. What to do?

Srivas 108 wrote:
The system is Win 7 64 Home Edition. It was working ok before. Maybe I should install all the updated? I hate to do that, my experience is that it slows down the system in the long run, but looks like I should do that.
I run the pro version, but it's basically the same. I've got all the updates installed, but I haven't noticed it slow down at all. Mind you, this is a fast system anyway. But if it's crashing, then installing updates won't fix that; you need a fresh reinstall on an absolutely clean disc first. Okay, that's a pain - but look on the bright side; you aren't running Windows 8. Recently I wasted nearly a day of my life on that, and I'll never get it back. The basic rule about M$ OS's hasn't changed - it's only the odd-numbered ones that are worth bothering with, as a rule. And none of them are worth installing until the first service pack is issued.

Adaptive noise reduction filter only applying to parts of a clip

MAC 10.9.4
3.5 Ghz 6-core
16GB ram
AUDITION CC
PREMIERE CC 2014
This is happening over and over to me, along multiple projects and multiple clips.
I apply Adaptive Noise Reduction, and tweak the properties. It sounds great but then when I 'apply', the filter is only applied to about 50% of the clip.....meaning it sounds great when tweaking the filter, but after when it is actually applied, only parts of it will apply.
IE, If I have a 15 second and apply noise reduction.......It sill sounds while tweaking parameters. Then after I hit apply, seconds 1 - 4 will sounds great (filter applied) seconds 5-9 will sound awful like no filter has been applied, and seconds 9-11 will sounds great again, and 12-15 will sounds awful again.
There is def something wrong here., This never used to happen in CS6, ever. Only when switching to CC.

Hi,
I have little use for/of the adaptive version of the noise reduction filters only because I want it ALL cleaner, so here is what I suggest: I left a very-detailed posting about "batch processing" in which I outlined using the the process version in the Waveform Editor. Give that post a read Re: How Do You Apply Process Effects To Multiple Clips In A Multi-Track?
Let me know if you need more help.
-CS

Issues with signal input adaptive filtering, it won't filter the added noise from the input waveform

Hello,
I have an issue with my adaptive noise cancellation program. Essentially I want to input a custom wav add noise to it and then filter the noise away in order to gain the custom wav again.
While doing so I want to read the learning curve and read the adaptive coefficients. Unfortunately I have an issue when it comes to the filtering of the custom wav+noise. It won't filter the signal at all.
It would be helpful if someone could have a look at it and possibly help me out.
Thanks!
Attachments:
Testing.vi ‏59 KB

Hey Jan,
Thanks for the reply. I am currently using the Adaptive Filter Toolkit in order to obtain those VIs. The VIs which are in use are the LMS Adaptive Filter ones.
I figured there might be an error with the input of the array. This VI requires a DBL Array but it seems like it can not process it.
The "Get Wavefirn Components" works better now but I still have an issue with a time. I put a 9s wav file in but it only computes it in a very short time and I can not play the file while it is computing.
I added the modified program to the attachments.
This program is ought to read a waveform file add noise to it and then use an adaptive filter in order to get the orginal waveform back again and if possible either store or play the final waveform.
Thanks for your help.
Attachments:
Testing.vi ‏62 KB

Filtering background noise using two microphones

Hi,
I am new to Labview so please bear with me. I am trying to work out the sound vibration level emitted from a compressor. I have a microphone placed next to it but it is operating in a noisy laboratory and therefore I need to filter out the background noise.
I have another microphone to record the background noise. I think I might need to use an adaptive noise cancellation filter but cannot figure out how to make one on Labview. I have tried simply inputting the two signals and subtracting them but get an error saying "Resource requested by this task has already been reserved by a different task" when trying to run it.
Basically I am looking for the simplest way to get rid of the background noise in real time or in processing the signals afterwards.
Any help would be greatly appreciated. Please ask if you need more information.
Thanks a lot,
Sam

An ax (also spelled axe) is a tool for chopping down trees. I was trying to make a joke. Like some other experienced LabVIEW programmers, I do not like the Dynamic Data Type because it hides the structure of the data contained within it.
The subtraction technique is standard and simple. The biggest issue is phase shift. Suppose the two microphones are 1 meter apart. A sound arriving on the line through the microphones will arrive 3 milliseconds later at one than at the other. Sound arriving along a line at right angles to the line through the microphones and equidistant from both will arrive at the same time at each. At other angles the time will vary between those values. Compensating for that delay or phase shift is necessary to get good cancellation.
In addition the amplitude of the signals at each microphone will vary inversely as the square of the distance between the source and the microphone. For sources much closer to one microphone the amplitude difference can be significant.
Directional microphones will further complicate the amplitude variations. I think that two microphones are not enough to provide unambiguous determination of the direction of an unknown source, especially when there are multiple sources.
Lynn

VFD noise on other sensor output such as : Thermocouples, Accelerometer, Torque meter

Hi,
I'm using a PCIe-6351 Daq board (and SCB-68) for my test rig. I'm collecting different kinds of sensor outputs through this DAQ board such as temperatures, acceleration, and torque meter output.
beside that, I have connected a VFD (Baldor H2 inventor) using a USB cable to the PC case. I use this VFD to control motor speed. (http://www.baldor.com/products/accontrols/vs_inverter.asp)
Here is my problem:
when I turn on the VFD I get a lot of noise on every signal. This noise is like a peak which repeats every 5-6 seconds.
So it's not 50-60 HZ noise of outlets.
You can see related uploaded video clips on :
http://www.megaupload.com/?d=4NHDIVV7
http://www.megaupload.com/?d=2461Z7KN
I have uploaded some pictures too.
Is there any way that I can filter this noise in Labview? ( I have tried Filtration VI in labview, but couldn't find a correct setting)
How can I get rid of this noise?
I really appriciate your help on this matter.
Thanks.
-Jeff
Attachments:
Pics.zip ‏585 KB

I can very much identify with this issue. I have a test bench with two motors and corresponding Baldor H2 VFD's on it. I have a variety of sensors such as accelerometers, hall effect sensors, and a torque meter. The bench was put together "professionally" but still get this kind of noise.
The *only* sensor that I have this trouble with is the torquemeter. I get an impulsive EMI blast every 12 seconds on this signal with just one drive turned on. With the other drive turned on, the noise is excessive. I have spent weeks troubleshooting assumed ground-loop faults with the torque meter company's tech rep - to no avail.
I have confirmed that this EMI is from the drive. I hooked up a wire to the signal lead of an oscilloscope's VFD (acting as an antenna) and the noise I get on this oscilloscope is very similar to what I get on my torquemeter. (The noise is present only when the drive is powered up)
The noise from the VFD will not be cured by using a low pass filter. Impulsive type events have very broad band noise.
My new approach is to try and use adaptive noise cancellation to get rid of the the VFDs' EMI on the torquemeter. I gather the noise signal on my DAQ card (PCI-7851-R) by plugging just one wire into the positive port of an AI port and tying a 1 mega Ohm resistor from that port's ground to the AI port; this provides a means of collecting the EMI from the drive with an "antenna." The wire dangles by the side of the VFD with the other end taped up. See the following for a description of adaptive noise cancellation with labview (also possible on an NI FPGA device):
http://zone.ni.com/reference/en-XX/help/372357A-01/lvaftconcepts/aft_noise_cancel/
I believe this to be the only sound signal processing means of addressing this issue. I am still struggling to get it to work myself. I'll advice as I progress.
Cheers
Jordan McBain, PhD
LabVIEW Controls Engineer
Revolutionary Engineering

How to remove noise from voiceover

I am an audition CS 6 newbie. I have tried several methods of noise reduction, but still have a noise under the voice in my voiceover. How do I get rid of this? I have tried adaptive noise reduction and noise reduction process. The sound is like sand being very lightly shaken beneath the voice. Any advice in very simple terms would be greatly appreciated. Thanks!

When you say "sand being shaken" is the noise a continuous drone or is it in intermittent bursts?
If fairlycontinuous, your best bet will be the Noise Reduction (Process) in Waveform view--but do 4 or 5 light passes rather than trying to do it all at once.
Go to the waveform and zoom in a bit. Find a section where the noise is present but there's no speech,
Open Effects/Noise Reduction/Restoration/Noise Reduction (Process). Click on the "Advanced" button at the bottom of the screen and check that the "FFT Size" is set to 2048. (It probably will be if you haven't adjusted it before.)
At the top of the screen, click on Capture Noise Print. There'll likely be a nag screen telling you to do this.
Use the drag bars to set the "Noise Reductions" to about 15% and the "Reduce by" to about 10dB.
Hit "Select Entire File" then the Apply button at the bottom of the screen.
Now, go back to the waveform, select a place with just noise, no speech again (it can be the same or a different part).
On the Advanced menu, change the FFT size to 4096, leave the sliders where they are, Select Entire File and Apply again.
Keep repeating this with FFT sizes of 8192 and 16334 (or until the noise is acceptable to you).
It's more difficult if you have an intermittent noise...let us know and I can make a suggestion but it'll take a lot of work.
It's worth ending by saying that the best way to do noise reduction on voice overs is to not record noise in the first place. It's worth checking the gear you use and your gain setting to see if you can get a better master recording.

Noise Print to Track?

Hi,
Is there a way to capture a noise print and apply it to a whole track within a multitrack file? If I have a hundred little files that all have exactly the same BG noise going into a track back-to-back, the BG noise should automatically be reduced in each of them via a single captured noise print. Thanks.

The alternatives would be to use batch processing to apply NR to every clip you want to restore, or add the Adaptive Noise Reduction effect to the tracks which should be able to detect the background noise and separate it out. Not as accurately as the standard NR effect, but it would work in this case.

Noise reduction not applying to beginning of clip

There's a bug in Premiere Pro which results in the hiss reduction or certain audio effects not being applied to the first 2-3 seconds of audio when exporting.
After looking this up on the Adobe forums I found other people with the same issue, and they were advised to edit the audio in Audition and reimport into Premiere Pro. I am having the same problem in Audition however.
I capture my noise profile, apply the adaptive noise reduction (or dehiss or whatever) and the audio sounds fine in the program. But when I export the first 2-3 seconds have the original hiss and you can then hear the effect kick in.
Can anyone help?! I offered to start doing video for my work and this is driving me up the wall.

Adaptive Noise Reduction is just that - adaptive. It identifies sources of dynamic noise over time, then reduces them.
If your clips don't have a few seconds before the in-point with which to apply the algorithm, you can often just copy/paste a few seconds at the beginning of your recording, run the effect, then delete that section. Dropping a marker after you paste the selection (while it's still selected) will make it simple to select that range again for deletion.
Otherwise, you might want to try the more manual NR tools. You'll have more control over what's identified as noise and how drastically it's reduced, and can make several light passes for better results.

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.

Transport Noise Removal/Noise Removal "Masks/Layers" saving?

Hi,
I have a problem that I'm looking for an easier way to solve. I have about 75 old Digital8 tapes from a Sony DCR-TRV310 that has a VERY annoying tape transport whine through every single tape. It appears to be exactly the same in all tapes (though the *apparent* volume and irritability changes due to the volume of action/background noise).
I have tried the "automatic" methods of dealing with this in Soundbooth, but they do not appear to make any noticeable difference. So I have been using the "Task", "Remove a Sound" option to remove the horizontal "bands" (frequency ranges) that appear in the entire tape (usually with multiple "takes" in different locations, so the banded sound would be unique to the camcorder). This has worked well, but is time consuming.
To get these bands, I have to highlight one using the "Frequency Selection Tool" drag it to -96db and then let the computer proceed to reduce that particular band, which takes about 5 minutes on my computer. Then do the same for the next band, etc. There appear to be 5-10 primary frequency bands that are consistent throughout the tapes.
It would be REALLY nice if I could manually select a SET of frequency bands (say, 1500-1625, 2050-2250, 3500-3675, etc.) that would eliminate the tape transport noise and be able to apply it as a custom defined mask/filter. This way I could do it once and then have it done for the entire tape.
Is there an easier way to do this that I am just missing?!?
Any help would be appreciated!
Best regards,
Scott

Hi Scott,
First, you can overlay the channels in the editor by selecting View > Channels > Layered in the menu bar, however this only applies to the Waveform view, not spectral, and I don't believe there are any user-facing opacity settings, so I don't think this is going to be the solution you want.
Here's the steps I would take for this particular workflow.
1. First attempt would be to use the Noise Reduction tools by capturing a Noise Print. Make a selection in an area of your recording that consists purely or mostly of the transport whine, then in the Tasks panel, open "Clean Up Audio" and select "Capture Noise Print." Click the "Noise..." button next to it and try the noise reduction again.
2. If this does not provide sufficient results, you may be able to use the Advanced Parametric EQ effect instead. Open the Effects panel and add the Advanced > EQ: Parametric effect, then open it's Settings UI. You can adjust the center frequency of each band to match your needs. Using the values you gave above, I would adjust Band 1 to 1560 Hz, Band 2 to 2150Hz, Band 3 to 3590 Hz, etc, each being the centerpoint of the frequency ranges you listed. Adjust the dB value low - say -12dB to start, and the Q value pretty high - this is the width of the notched frequencies. You'll want to experiment with both of those parameters, but you should be able to create a rudimentary Notch filter.
3. You may simply be trying to perform a task that is slightly beyond what Soundbooth is intended for. If you are using a Windows-based system, you may want to download the 30-day trial of Audition 3.0. It offers the same sort of Spectral view, but lots more effects and restoration features. In your case, I would recommend using the actual Notch Filter effect which gives even more control over the frequencies and width parameters. Once you find a setup that works, save it as a preset. You can then perform a Batch operation, correcting ALL your files at once using that preset. It's Adaptive Noise Reduction tool may also be more successful at identifying the constant tones and removing them.
Durin

T410s fan noise and screen dimmer than my T400s

My t410s fan never stop when on ac adapter, noise is so annoying when in quiet room.
also the screen is not bright as my t400s r and with tiny Grid if you carefully look into it, i dont know this is normal or not
the screen on T410s is LT141DEQ8B00 dont know the manufacturer of it
the screen on T400s is samsung LTN141BT08001
T400s screen is much brighter than my T410s
my T410s still under almost 3 years warranty , any suggestion should i have it service by the depot?
bse on you guys experiences which screen is better ?
thanks

hey mangojaijai,
from what you have mentioned over here, i suggest going to http://support.lenovo.com and update your system first.
if your issue remains after the updates, get in contact with our tech crew -
http://bit.ly/LNVsuppNum
WW Social Media
Important Note: If you need help, post your question in the forum, and include your system type, model number and OS. Do not post your serial number.
Did someone help you today? Press the star on the left to thank them with a Kudo!
If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"!
Follow @LenovoForums on Twitter!
Have you checked out the Community Knowledgebase yet?!
How to send a private message? --> Check out this article.

Crackling sound while playing music in HP SPECTRE 15-4010nr Ultrabook

Hi all,
I have recently bought [4th Jan. 2013 ] HP SPECTRE 15-4010nr Touchsmart ultrabook with beats audio.
I am very unhappy with sudden/random crackling bursts of noise while playing music.
The problem is not restricted to hp inbuilt speakers as it also reaches on headphones, so it's something internal to laptop.
Its really disappointing to have such a bugging issue from this high end laptop.
Please let me know if there is a solution to this problem.
Thanks in advance!!
This question was solved.
View Solution.

Yeah even for me it seems unhooking power adapter does the trick !
Even my Laptop is just 4 weeks, how could manufacturers let so common bug seep through their high end laptops.
Are these not tested for audio video quality ?
Anyways I need an alternate fix as I do not want to lose my laptop for a month, in exchange or return process.
P.S.: Sound drivers re-installation is of no use.
HP Guys, thanx for ur concern, but if u can give a fix for AC adapter noise interfernece it will be great. !!

What's New in Audition 3.0?

Don't have time now to get into how they help, but I would just like to say that there is MUCH improvment in Audition 3.0...I'd like to say this because I've heard lots of grumbling on other forums about 3.0 not being an upgrade at all over the previous versions 1.5 or 2.0, this is completely false, for me in particular the improvement in MT View (editing: collectively trimming, duplicate entire track and fading improvements) are indispensable.
and most people don't even mention any improvement aside from spectral view (which is pretty big in itself, isn't it?) spot healing etc...which I haven't even used yet.
I just want to say, they definetly made some good improvements, while they may not be overwhelming to some they are entirely useful in my situation and I think for most people they would come to see they are definite improvements if they used it long enough.
Getting started / New features
What’s new
Record and mix
Adobe Audition 3.0 is a powerful tracking and mixing application. Mix faster with new automatic crossfades, clip fade handles, and automation-editing improvements. Take full advantage of the latest hardware with multicore processor support and an optimized mixing engine.
VST plug-in manager
Quickly enable or disable specific VST plug-ins, optimizing performance. (See Enable VST effects.)
Auto crossfades and clip fade handles
Simply overlap clips to crossfade them, and adjust fade curves with on-clip handles. (See Fade or crossfade clips in a track.)
Improved multitrack editing
Efficiently edit sessions with these key enhancements:
Collectively trim and fade grouped clips. (See Grouping clips.)
Ripple-delete ranges of clips, instantly removing time gaps. (See Trimming and extending clips.)
Adjust selected ranges of automation points. (See Edit automation envelopes.)
Duplicate the contents of entire tracks, including clips, effects, and automation. (See Duplicate a track.)
Simultaneously view all input and output levels to comprehensively monitor a mix. (See Monitor levels.)
XML session support
Save sessions to XML format and other shared standards for multitrack applications. (See Save multitrack sessions.)
Mix down directly to Edit View
Quickly output a session directly to Edit View, without first exporting a file. (See Create a single audio clip from multiple clips.)
Video previews for surround mixes
Watch a preview in the Video panel while adjusting mixes in the Surround Encoder. (See Previewing video.)
Create and arrange
Adobe Audition 3.0 offers powerful and extensive looping capabilities, as well as support for VST instruments, making it easy to create and arrange great-sounding music. Improved processing, including the high-quality Radius time-stretching engine from iZotope and numerous new effects, gives you infinite creative options.
MIDI tracks and piano-roll editor
Import, record, and edit MIDI, and output it through VST instruments or hardware synthesizers. (See Composing with MIDI.)
New effects
Explore creative sonic possibilities with Convolution Reverb, Analog Delay, Guitar Suite, and other new effects. (See Effects reference.)
Radius time-stretching from iZotope
Access industry-standard algorithms in the updated Stretch effect, as well as the File Info and Audio Clip Looping dialog boxes.
Bitmap audio images
Export spectral graphs for detailed editing in an image-editor like Adobe Photoshop®. Or, import visually-oriented graphics as source material for experimental sound designs. (See Spectral Bitmap Image (.bmp) and Import a bitmap image as audio.)
Improved CD ripping
Automatically import track information from your favorite CD database. (See Extract CD tracks with the Extract Audio From CD command.)
Enhanced file sorting
Sort files by track number, or by the date they were opened or created. (See Change how files appear in the Files panel.)
Customizable workspaces
Tint panels and dialog boxes to suit your working style. Add favorite commands to the shortcut bar. (See Change interface brightness or tint and Display the shortcut bar.)
Edit and master
Adobe Audition 3.0 includes a full set of editing, restoration, and mastering tools that give you unprecedented flexibility and control. Comprehensive waveform-editing tools combined with innovative spectral frequency brushes let you edit with power and precision. The new Mastering effect, phase correction tools, and Top/Tail view make Adobe Audition 3.0 the ideal audio editing and mastering environment.
Spot Healing Brush
Quickly brush over artifacts to seamlessly remove them. (See Select artifacts and repair them automatically.)
Effects Paintbrush
Create free-form selections, and layer brush strokes to determine the intensity of effects. (See Select spectral ranges.)
Marquee pan and phase selections
Process discrete stereo information such as center-panned vocals in Spectral Pan Display or out-of-phase audio in Spectral Phase Display. (See Select spectral ranges.)
Play spectral selections
Play back selected frequency, pan, and phase ranges to precisely restore and process audio. (See Play audio linearly.)
On-clip fade and gain controls
Visually adjust selections or entire files. (See Visually fading and changing amplitude.)
Top/Tail View
Fine-tune loop transitions by simultaneously viewing the beginning and end of files. (See View the top and tail of an audio file.)
Mastering effect
Optimize audio for maximum impact with a series of professional processors. (See Mastering effect.)
Adaptive noise reduction
Quickly correct a wide range of variable broadband noise. (See Adaptive Noise Reduction effect.)
Graphic Panner
Visually adjust the stereo field to enhance spatial perception. (See Graphic Panner effect.)
Play lists
Organize and play marker ranges for live performance and broadcast. (See Creating play lists.)
Efficient file opening and saving
Specify default formats for Open and Save As dialog boxes, and quickly save groups of files to one format. (See System preferences and Save a group of audio files to one format.)

ah guh suk yuh dutty sket mudda bumbohole battybway!
It's a very helpful post because there is people who come to this forum when trying to decide to what recording software too purchase, and there's also people all over the internet who say that Audition is not better then Pro-Tools and more amateurish when in many regards it is more professional and has a better interface and GUI, especially if you're not doing too many tracks (less then 16 or perhaps more on a high end system). It's multi-track is easy and stays out of your way, has great automation, and some updated editing capabilities and has an excellent mbc that pro-tools does not have (maybe not excellent but very good)..and I believe pro-tools is a cpu hog doing certain things just like Audition is.
So people come to this site and I'm going to tell them the truth that it has been added to nicely since Adobe bought it and hopefully if people buy it will have another update to make the multi-track even better. It has a few bugs and downsides but so does pro-tools, I think the upsides are greater then pro-tools.
The only downsides are the midi is a bit lacking compared to other programs which have been in the midi-game longer, and that it does use alot of cpu for certain efx, and the multi-track is better in some ways but not as advanced in others in terms of sequencing and arranging, it could improve in that area, loops and stretching loops to match each other then being able to record how you bring the loops in and out in a sequence like ableton but in it's own way then it would rule the world forever.

Is this me or a bug? Loading disabled effects rack wrecks audio!

Background:
I am NOT an audio pro, but am an experienced tech guy and have used Adobe suite products for many years.
Just loaded up CS6, including all updates, on a new decked-out Win7 computer (32G RAM, 12 core CPU, CUDA board, etc).
I have a clip (96hHz 32 bit) I'm using to learn the workflow I will use for analog->digital conversion...
There is a musical section in the middle that sounds truly awful with my effects rack in place. But then I noticed I could not get back to the original...
Symptom
If I load the audio clip, all is well -- plays as expected.
If I load my Effects Rack, with all effects preset to be disabled, the sound is immediately and obviously messed up.
Turning the effects on/off does not fix the problem.
Questions
- Is there any reason a set of disabled effects might still impact the audio? If so, where do I find such settings?
- Is this a likely bug?
- Anyone else ever encountered anything like this?
Thanks much!
Pete

NAILED IT.
The following is 100% repeatable for me. Can anyone else replicate this?
1) Choose 10-20 seconds of music, with a bit of silence before or after (as an audible marker), stereo, 32 bit, 96k -- or even 44.1k although the problem is not as pronounced in 44.1k (see below)
2) set up to play as a loop
3) load any of the following into your effects rack. Loading more than one just makes it more obvious.
a) Adaptive Noise Reduction, default settings, then turn ON high quality and set FFT size to 16384. (8192 is sufficient for 96k, but at 44.1k I need 16384) [This one produces horrifyingly awful results]
b) Auto Click Removal, default settings, then Threshold 1, Complexity 100 (This one only causes trouble on 96k files)
c) Auto Phase Correction, default settings, then Analysis Size 4k, Time Resolution 1.0 msec, Response Ultra Slow
4) BE SURE the effect is turned OFF (but leave the rack on)... or turn the whole rack off. The effect SHOULD do nothing at all.
Now play the loop a few times.
Notice the following anomalies:
A) The cursor tracks (sometimes jumpily) in real time, but the sound is much slower. With Adaptive Noise Reduction @ FFT=16384, I can't really tell it is music... running about 1/10 speed or something
B) It is as if the on/off switch for the effect does nothing to disable the effect during playback
C) Your CPU will likely be idling. Whatever is slowing this down is NOT a bunch of processing, but some other kind of overhead/bug
D) In some situations, I even see the Levels Meter stop moving, as if there weren't enough spare cycles to update it.
Discussion
I wonder how many effects are "always active" like this during playback? Right now, I feel I cannot trust this engine to give me reliable feedback for my settings. My suspicion: most if not all effects are at least partly active for playback, even if turned off, at least with respect to the underlying engine.
It is claimed some of these effects can have performance issues depending on the platform. My platform has far more capacity and speed than required, yet still there are issues. This tells me I cannot trust my ears to tell me if a particular effect and setting is giving me poor results... or if it is just this hidden engine bug causing the sound to degrade. (Note: if I use all three effects with settings as shown, my CPU is running at 11 percent. Not even enough to get the fan going! Definitely not system-limited.)
If there IS some kind of built-in engine limitation relating to these kinds of problems, I highly recommend that Adobe implement a visual marker to indicate that the effects rack is unable to do its thing in real-time, thus what I am hearing is not an accurate representation of the effects. (However, even if so, I would expect that disabled-effects should not contribute to any performance problem.)
I sure hope this is enough so others can replicate the problem!
Thanks much,
Pete

Ac adapter noise

Similar Messages

Maybe you are looking for