Crackling in recorded audio

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  • Updated 3 years ago
In Camtasia Studio 8, I had no problems until I recently upgraded from Windows 7 to 8. Now, I get no end in trouble trying to record my video tutorials. I've tried everything I could think of on my end....from installing latest audio drivers (yes for Win8) for the motherboard, and did so several times.

I uninstalled CamStuido 8 and re-installed. Still having issues. When I reboot and try a test, with no apps running, it records fine. But the moment I open the app that I need to do video tutorials for, I get crackling in the recorded audio.

I did another test to see if I could pinpoint where the problem was. I have a small audio recording app, called TotalRecorder. When I run an audio recording test on it, the playback is as smooth as can be.

So, this narrows it down to Camtasia Studio and recording audio/video with another app open. Again, I had no problems like this until after upgrading to Win8. There must be some kind of compatibility issue with this OS, perhaps
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Don Nash

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  • very, very frustrated

Posted 6 years ago

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Logan S.

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Hey Don,

Hit your (windows key + R) and then type 'dxdiag'. This will bring up the directx diagnostic tool. Then click "Save All Information". Please attach that file for me.

You can upload the file through this service: http://tinyurl.com/support-upload

Please select "Logan S" as the recipient so that the file will be sent directly to me.

Last, be sure to post back here to let me know that the file has been uploaded.

Please let me know if you have any questions.
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Don Nash

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I just sent it.
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Logan S.

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Got it, Don. I assume you are using your usb mic for the recordings? Do you have an internal mic, and have you tried using that, or is it the same result?
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Jay Rock

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I'm using a audio interface and a really nice mic I'm getting crackling and popping sounds when i try to record any idea
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Fred Grover, Champion

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What kind of audio Interface are you using and what Mic do you use ? Is this only happening when recording into Camtasia Studio by the way which version are you using ? Or is this happening when you record into something like Audacity or any other recording software ? Let us know and we will see if we can help or offer anymore suggestions. Thanks for posting and have a great day/night.
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Don Nash

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I am using a USB Microphone. A Blue Microphones Yeti. One of the best options for podcasts/tutorials. As stated previously, everything worked perfectly fine until after Upgrading from Win 7 to Win 8.

The audio (only) app, TotalRecorder works perfectly with recorded audio, right now. It's only Camtasia Studio (8) that's giving me fits. And I'm behind the 8-ball on this because this is a major part of what I do for a living, and Camtasia Studio is literally holding me up and costing me money.
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John S. Richards

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Don,

Comments from a few days ago...

Does this sound occur if all other devices are unplugged?

I found noise added into audio recordings using a USB Blue Yeti mic, and while recording, using an Apple heat set with remote inline mic, which was plugged into a laptop jack, to monitor audio during recording.

By moving ear-bud head set from the PC jack, moving it to the audio monitor jack on the Yeti mic, the recorded distortion problem vanished.
Perhaps best to use headsets with no inline mic to avoid possible interference.

It seems tiny cross-talk like distortion was being introduced in my first method. Perhaps moving equipment may help you?

ref. http://feedback.techsmith.com/techsmi...

Does this help?
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Don Nash

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No joy. I unplugged everything except the usb mouse. Still the same. What remains a mystery is why it often will stop crackling/popping if no other app is running. But as soon as you start one up, it's back to the same.

When I record audio on Total Recorder, I get no noise at all. So, to run another test, I downloaded Microsoft Encoder and recorded the screen like I would in Camtasia Studio. It has the same problem. Seems there is something about recording video and audio simultaneously that is the issue.
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Josh Holnagel, Employee

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Hi Don,

Hopefully, our technical support department can get this sorted out for you as soon as possible.

In the meantime (and I may be misunderstanding something, so if I am, forgive me) can you record video only with Camtasia Studio and simultaneously record your audio with Total Recorder? Then, once both recording are complete, just sync them up in the Camtasia Studio editor?

Let me know if this might work, even if it's not ideal.

-Josh
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John S. Richards

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Don,

Hardware Check Tips:
1. Change mic USB cable to see if noise moves.
I once had a defective USB cable, replacement helped.

2. Make sure USB connections are firm.
USB plugs & sockets can become loose over time.

3. If using a USB Mouse & Mic at the same time.
Try another mouse, a non USB Mouse, or no Mouse.
Changing Mouse may move problem.

Other Tests:
You noted: Total Recorder + Microsoft Encoder = noise.
What results occur if you test:
Audacity + Microsoft Encoder = ____?
Audacity + Camtasia Studio 8 = ____?
Camtasia Studio 8 alone = ____?

Perhaps something here helps?
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Don Nash

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I have tried all manner of usb unpluging...unplugging the usb mouse and using just a wacom stylus. I have spent almost 3 full days just trying to diagnose this and it's driving me nuts.

Camtasia Studio only = usually ok (not always, but 90% of the time)
Camtasia Studio + 3D Coat (or After Effects or 3ds Max) = noise
Total Recoder only = OK (no noise/crackling)
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Don Nash

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Oh, and I forgot to mention that Microsoft Encoder has a screen capture utility (just doesn't have all the editing capability nor the different video format options that Cam Studio does). So, when doing tests, it's actually worse than Camtasia Studio. It has crackling all the time. Camtasia only does it when another app is open/running. Very odd.

Another thing of note is that the Blue Yeti has a feature that allows you to listen to your voice feedback live through headphones you connect to the Yeti. I can hear no crackling or distortion at all until I fire up Camtasia Studio or MS Expression Encoder
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John S. Richards

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Don,

Occasionally I've run Audacity + Camtasia Studio 8 at the same time, to record Audio simultaneously in each program.

This way there is always back-up and different recording settings can be used in each program.

Sometimes improved productions result from re-recording voice-over audio after all edits have been made.

If the problem does not move, perhaps best to contact technical support for help.

If you find causes & solutions please post.
Hope this helps.
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John S. Richards

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also have a look here for more tips: https://support.techsmith.com/entries...
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Dave O'Rourke, Senior Software Engineer

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Don,

Have you tried contacting Blue Microphone support? If you're experiencing this issue in multiple programs, that would seem to indicate a driver or hardware issue.

I was Googling for others with a similar issue as yours, and found another user reporting crackling audio with a Blue Yeti microphone. Someone from the Blue support team chimed in and suggested they contact Blue support. Here's the link: http://bluemic.com/salesandsupport/se...
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Don Nash

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I would have done that already, but I ran a test with the microphone on my webcam and it's exactly the same (crackling noise). If I had not tested with an audio-only recording app (and it turned out fine), then I might assume it's an audio driver or bad connection.

But it narrows down to simultaneous screen (video + audio) recording, and having another app open/running.
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Don Nash

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Ok...I think I got it resolved. Went back into the computer case, thinking it might be an exposed (cooling) fan wire or loose connection somewhere, and re-worked the cable management. I also noticed that the CPU cooling fan (large one from Zalman) was just barely touching the back of the graphics card.

I upgraded the card about the same time as the OS, and had to move it up one slot, to clear the hard drives. It was longer than the previous one.

So, it could have been a loose connection or something, but I suspect it was noise or static being transmitted between the GPU and the CPU cooler > CPU

Thanks for everyone's help here. That's the thing about troubleshooting...it could be one of a hundred different possibilities.
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Dave O'Rourke, Senior Software Engineer

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Don,

Thanks for reporting back. I'm glad you found a solution.
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Rowan Kunz

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Hey,

I'm also having a similar problem.

When I used Camtasia 8.1.0 and I record screen + use Logitech C920 webcam (not integrated) and USB mic (Blue snowball) I get crackling audio.

I can do the following however:

1) Record narration in Camtasia - audio comes out perfectly
2) Recorded screen + use integrated webcam + USB mic = audio works perfectly
3) Record screen + use Logitech Webcam for video and audio - all works perfectly
3) I've also tested audio via USB mic with Windows recorder audio works perfectly
4) I've use Logitech webcam recording software and video and audio then work perfectly

So, it seems like the problem is that when I use Logitech Webcam and Blue Snowball USB Mic with Camtasia (and not the integrated webcam), it causes crackling with the audio I record.

Any suggestions to prevent this?

We need high quality webcam hence can't use the integrated + also need crisp audio, so cannot use onboard mic, or mic on Logitech webcam.

While we could record video only with Camtasia, and record audio via another program and import and sync - we have a lot of video to create (so this will slow down process) + are training other people to use this set up to create educational content so this will prove very difficult for them.

Thanks!

Rowan
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Rowan Kunz

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So I tried recording separate audio and then using Camtasia to do video only - and then sync, and discovered same problem - crackling of audio.

SO looks like there is a problem with USB Mic and interference from Logitech Webcam :(
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Kelly Mullins, TechSmith Employee & Helper

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Hello,
We are asking for your assistance in helping us make great software.

We have begun an in-depth study of audio devices and / or audio software used in conjunction with Camtasia Studio 8.x or Camtasia for Mac 2.x in order to detect and better understand issues and conflicts customers are experiencing with our software.

If you are willing, we have created a short form for you to fill out (one form per audio device or audio software program) to let us know if your audio software or hardware is conflicting with Camtasia or if it is working as expected.

You can fill out the form here:

https://docs.google.com/forms/d/106Ty...

We appreciate you taking the time to help us find any audio software and hardware that might be causing issues with Camtasia video projects.

Kelly Mullins
Technical Preview Program Coordinator
User Assistance Group
TechSmith
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Cian Jinks

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Does anyone have a fix for this because I am becoming really frustrated trying to stop it crackling by increasing the audio buffer and other things.
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Kelly Mullins, TechSmith Employee & Helper

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Hi Cian,
What version of Camtasia Studio are you using?
The latest version has had significant changes and bug fixes for audio.

And, what sort of audio equipment are you using? It's hard to make specific recommendations if we don't know what your process or workflow it.

Kelly
User Assistance
TechSmith
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Fred Grover, Champion

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Cian it will be interesting to see your response to Kelly's question. He is correct and there are quite a few things that can cause audio problems so if your process is posted it will possibly be easier to diagnose what is going on with your audio. Sorry you are having this issue and thanks for posting. Have a great day/night.
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Cian Jinks

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I'm sorry guys but all of a sudden it stopped happening. It's been happening for 2 days and I haven't changed anything when it suddenly stopped.
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Fred Grover, Champion

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Cian thanks for posting your response back here. No need for apologies as I am glad to see that your issue is fixes or gone away. If you have any other questions feel free to post them here and thanks for being part of this community. Have a great day/night.
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Dozer

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Not sure if this problem was ever resolved. But here are my findings.
It is a sample rate mismatch error.

I use an Emu1820M and it has full control because I use those drivers.
However, in the windows mixer, if you change sample rates, or your
driver does for other reasons, or a device you hook up, or a session you open up,
or a hundred other reasons..EXAMPLE: USB Mic.
You need to ensure that you update the Windows sound settings for your driver.

You right click the Speaker Icon in the lower right screen taskbar.
Select Playback Device and then switch the sample rate to the same rate
as your audio card, or USB mic. 
Example: Your mic is set at 48kHz, but windows mixer at 44.1kHz., and Camtasia set
to record at 44.1kHz or other.

THEY ALL NEED TO MATCH.
Here is the kicker. You have to go to the Playback Devices, after you match sample rates,
and click the Test button.
You may get a popup warning that another device is using that sample rate.
It will then play the sound from left to right.

Now go to the Recording Devices, and set the same rate.

Then make sure you are recording at same sample rate in Camtasia. 

That is how I remedy the problem. 

Have fun, Dozerbeatz

Your next bet would be to, in the Recording Device Advanced tab.
Uncheck "Allow applications to take full control of this device". 

Even then, its intermittent and sometimes must close and open the recorder, 
doing test a couple of times, till it goes away. 
(Edited)
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Dave O'Rourke, Senior Software Engineer

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I realize this is a very old thread.  So this is more for new people who are just now finding this thread...
Both Camtasia Studio 8.x and the newly released Camtasia 9.0 mix audio at 44.1 kHz, 16-bit, Stereo.  So if you have control over the audio format, it's best to use this format when recording audio.

In Camtasia 9.0, we also did some work to improve resampling when audio files are imported in other formats, such as 48 kHz audio.  You can download the free trial of Camtasia here: https://www.techsmith.com/download/camtasia/

If you continue to have issues on the latest version, please visit https://support.techsmith.com and open a ticket.  Someone will follow up with you by email to help troubleshoot further.