Screen recording: Backround Audio has buzzing during Playback.

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  • Updated 2 months ago
1. Windows 10 Surface Pro - Device battery fully powered, not plugged in to AC.
   All software current as of June 12 2018.
2. Camtasia 9.1.2 screen recordings exhibit background buzzing sound.

    a.Record only System Audio or, b. Record System Audio + System Mic.

All Recordings on playback all have a buzzing sound in background as though some Audio Device is broken.

This is not a 60Hz ground loop hum.
Buzzing sound is at constant level in any recordings...

Has anyone had similar issues?
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John S. Richards

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Posted 5 months ago

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bnystrom

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Are you using Volume Leveling in Camtasia? I found that it can introduce a hum in some cases.

Also, try making a recording using Windows Sound Recorder, just to see if you get the same results. If so, it indicates an equipment problem. If not, it's something in Camtasia.
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Dubie

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The first and most logical thing to do is make sure your audio drivers are up to date especially
after a Windows update. Windows updates tend to break things.

If they are up to date or a audio driver update does not help try these audio settings

Adjust Playback Settings:

1. Right click the speaker icon on the Taskbar and select Playback devices to open Sound settings. Double click your speakers device to open the Properties

2. Choose the Levels tab and then adjust the Microphone slider to 0 Click Apply

3. Go to Enhancements tab and then check the Disable all sound effects Click Apply then OK exit.



Adjust Recording Settings:

1. Now select Recording devices.
2. Double click the Microphone and open the Properties box.
3. Go to Levels tab. Adjust the Microphone Boost slider to 0. Click Apply then OK twice to finish all the settings.

Hopefully that help to fix it

:)
(Edited)
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John S. Richards

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Good Tip. Thanks. But not using Enhancements with Surface Pro Built in Speakers... Problem seems software based after some tests....
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John S. Richards

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Thank you for your comments.Not using Volume Leveling. Just recording System Audio.Windows Sound Recorder does not record the distortion buzzing sound heard in Camtasia Recordings. Seems as if not a hardware problem. Windows Audio Tests passed. Must be a software problem... will head over to Tech Support and post a ticket. Interested if others have had this problem...
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kayakman, Champion

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hey John, glad to see you're back; trust all continues to go well for you

still get the buzzing if capturing only mic?
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John S. Richards

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Hi Kayakman,

Buzzing is introduced when making new screen recordings with system audio.This is not mic interference related.If recording mic only, the buzzing sound is not heard in the produced recording. Perhaps I damaged some TBD software element...
DxDiag report noted a Fault bucket, type 5, RADAR_PRE_LEAK_64.

Perhaps this note is a memory leak caused by too long a screen recording (>54mins.) and, as perhaps file size may have been too large for Camtasia Studio, this caused the system crash.

Upon reboot, buzzing is introduced into new screen recordings when system audio and mic is used, or when only system audio is used. If recording mic only, no buzzing is introduced.  Old recordings, if re-edited and saved, sound also normal and have no buzzing.
At Command Prompt, using Windows 10 System File Checker, no errors found. Waiting to see if CamStudioDiag.txt  and DxDiag.txt reports added to my Techsmith Support Ticket provide any insights for TechSmith.

Imagine I may have to uninstall and re-install Camtasia Studio 9.1.2, but will wait for Tech Support to evaluate and respond.

Thank you for the note.

Will update you when I have more to add.

Best regards,
John
(Edited)
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John S. Richards

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August Update: Surface Pro problems...

Both Snagit and Camstasia Studio exhibit background noise when System Audio is recorded.
When System Audio if turned off the problem does not occur.

It may be that Microsoft Updates introduced this problem.
Previously this problem did not occur when System Audio was recorded.

There was a problem with the current version of the Integration Driver.
Note the Microsoft Device Driver Troubleshooter will identify there is a problem, but at the moment it will not solve the Surface Pro Integration Driver problem. I had to have this corrected by a Microsoft Technician at their store.

The MS service tech has solved the driver problem.
Unsure if it was rolling the driver back or replacement.
More to be posted later.

Note that although the driver problem has been solved by Microsoft, both Snagit and Camtasia Studio still playback recorded noise when System Audio is being recorded.

Next step to test is a complete re-install of Camtasia Studio and Snagit to test if this make the problem go away, on the assumption the Integration Driver somehow damaged TechSmith software...

Will update again after this next test is completed...

Interested to know if others using Surface Pros have had similar problems.
The software updates it seems may affect 1 in 4 Surface Pros.
If a reinstall of Camtasia Studio and Snagit does not solve the problem, a complete replacement of my Surface Pro May be required due some TBD hardware issue which occurred during recent Microsoft updates...

See this reference note from Microsoft:
https://answers.microsoft.com/en-us/s...
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John S. Richards

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Update.
Drivers all updated and correct.
Uninstall and reinstall Camtasia Studio and background noise still recorded...
MS store solution is to replace Surface Pro...it might be hardware or software related at the moment they cannot tell.
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John S. Richards

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Final Update: Problem Solved.

Problem of noise recorded in System Audio was due to incompletely installed Windows updates for Surface Pro from June automatic updates..

It seems there were driver conflicts within Windows. 

My Surface Pro image was tested on another device and replicated the same issue, (of System Audio Noise being recorded in Camtasia Studio and in Snagit. 

It seems the update (which included drivers for Surface devices) did not fully complete and left fragmented files. 

These were able to be fixed by re-applying the system updates which rectified the driver conflicts. 

The fastest way to do this was by an “in-place upgrade” This technically means reinstalling system files but it does not remove any applications or files, helping to preserve the Windows image, while copying and replacing only essential system files.

Once completed, problems of noise being recorded in System Audio in both Camtasia Studio and in Snagit went away


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kayakman, Champion

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glad to hear you got it solved; that was good, persistent, detective work
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mpieniek

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John, I have had similar issues.
Can you give a brief walk through on the "in-place upgrade"?
Is this the same as the "system restore" or is it different.
The options that I see all indicate that that windows 10 will be completely reinstalled with removal of apps, which I was hoping to avoid.

Thanks, Marc 
(MS Surface Pro-3; Windows 10 Pro)
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John S. Richards

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Marc,
The in-place upgrade was done by Microsoft at one of their walk in stores. It is a term they used. It did not affect saved files. I think they mean rolling back to an earlier restore point, then re-installing needed updates. I had had automatic updates turned on. Perhaps had I made a Restore Point before updates installed, it may have been easier to roll the system back and re-install the updates myself. I did not see any updates that did not install properly, nor any notification of a specific update installation problem, however I could see later that Windows detected a problem, but that Windows diagnostics could not auto-resolve the problem, nor specifically tell me what the exact problem was...other than a general descriptions of System Integration Tools issue. All Windows functions worked properly. It was only that when System Audio was recorded in Camtasia Studio or Snagit that Audio Noise showed up in the recorded System Audio. The general conclusion was upgrades had installed, but a portion of upgrades did not fully complete installation. If you have similar problem or concerns you might be best served by visiting a Microsoft Store for help. You can make appointments on-line. Hope this helps.
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mpieniek

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Thanks John.
I have a few laptops, and it only seems to happen on the MS SP-3 and Surface Book 2.
This issue is not present on the old Dell XPS-12 (made in 2015!) which records in superior audio using the Realtek Stereo Mix HD driver that comes on the Dell machines.  The StereoMix driver does not show up as an option for recording devices on the MS SB-2 machine.  It does show up on the SP-3 but audio quality is "rough"

I  downloaded the Dell Realtek Stereomix audio driver and installed it on the MS SB-2 machine to see if it would help....it does somewhat.   I think the audio codecs that MS is pushing onto their machines unfortunately doesn't work well for doing the audio recording from a pre-recorded webcast.  I took a *.trec recording from the Dell and copied it onto the MS machines to listen to it in Camtasia....they sound great.  Issue seems to be MS audio drivers (which are up to date as best as I can tell when I go into Device Manager and click on the "update driver" box).

Thanks for your help.   I will keep the Dell machine in meantime!