audio popping when cutting/splitting

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  • Updated 2 years ago
It's been 3 years later and I am still dealing with this.  Noise removal does not work.  Audio ducking is the only thing that works but to do this on every single split/cut is ridiculous.  Can anyone help?  Check out the video @ 2:01 mark:

https://youtu.be/ZONzI_33QzI?t=121
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john

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  • frustrated

Posted 3 years ago

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Timbre4, Champion

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Hello,

What is the format of this audio track and how was it recorded? Are you doing a straight cut or also trying to engineer some fades after the fact? I just compiled a promo clip from several separate clips made previously and at least a dozen trims to get it down to three minutes. I never have noises (artifacts) like that. While the bulk of my audio work is produced outside of CS8 and then imported to the clip bin, the cuts I referred to above were made on the CS8 timeline.

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Joe Morgan

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I see that you uploaded that video in May of 2013. There have been a large number of bug fixes and maintenance updates since then.The newest version available when you uploaded that video was 8.1.0.

http://www.techsmith.com/camtasia-version-history.html



What version of Camtasia are you running now???

The newest version is 8.6.0
 I cannot even reproduce the problem shown in your video because Camtasia quit recording to .camrec files in May of 2014.  Even back then Camtasia was still loaded with bugs. I wouldn't run a version that old for any reason. Unless you're still running Windows XP?



If you are running Camtasia 8.6.0 maybe you could upload a current video demonstrating the problem?

Or better yet contact Tech Support and let them sort this out for you.

This is a Free Service. Submit a ticket at,

https://support.techsmith.com/hc/en-us/requests/new


Or call, >>> 1.517.381.2300

 Toll Free: 800.517.3001 (U.S. & Canada Only)

8:00 AM to 7:00 PM EST Monday through Friday

Regards, Joe

(Edited)
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john

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Thanks guys. I am using the latest version of camtasia studio. The yt video was just to demonstrate the issue. I record the screen using a blue yeti microphone. Cs saves it in its own format and brings it into the editor. I am not bringing in outside audio. Its all from the capture.
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Timbre4, Champion

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Camtasia can save as either trec or AVI; sounds like trec single track and you're cutting audio and video at the same time?
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john

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Exactly
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kayakman, Champion

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I'd recommend that, after editing, you export all audio in your project and use Audacity to accomplish the noise reduction, then swap that cleaned up WAV clip for your original audio

my original captures often sound noisy like yours [I use a AudioTechniques external USB mic], and Camtasia's Noise Reduction function does not work that well for me

however, the Audacity's NR works great for me
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Joe Morgan

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I like your concept kayakman. However, the popping is exported right along with the audio.
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john

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I have not had much luck with noise removal. It might help with the pops but it also compromises the quality of my voice as well.
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Timbre4, Champion

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Recording my audio In Sound Forge, I have a noise gate preset saved as "-30" so one click cleans the entire track with absolutely no effect on the narration. If the popping were 30db below reference level it would be removed.

The only time I really notice clicks or pops is when a USB audio interface box is engaged or disengaged on another PC to record keyboards. When the track recording stops, there is sometimes the odd click noise to trim out.

My main recording chain is still non-USB mic to preamp box so I never really run into the issue. 

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Joe Morgan

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I believe the problem is related to a microphone setting in some way. I understand that you are capturing audio to a .trec file.

I played around a bit and recorded my webcam. The audio was set to the default setting of 32Khz with the Logitech Webcam Software. I recorded the webcam directly through Camtasia and I was able to reproduce the audio popping you have encountered.
I switched the setting to 48Khz and ran another test. The popping was alleviated at that frequency.

This may not make any sense. However, Logic doesn't necessarily apply when you are trying to workaround a software bug. If logic did apply to this issue then it probably would have been resolved by TechSmith long ago.
 

 I even played around and imported a 24 bit audio file at 96,000 Hz directly into the editor. The popping was more pronounced.
At 16 bits and 96,000 Hz there was no popping at all.

 I can only surmise this from my tests.
It's probably an issue you can resolve yourself. Provided you can stumble across the right setting for your microphone through experimentation.
I don't own a Yeti mic and so I have no idea what your options might be.

It may even be related to a Windows driver or something along that line.

Unless someone in this forum has actually encountered the same issue and resolved it. The odds that you will find a solution in this forum are probably not that great.

I'd run it by Tech support and see what they have to say. I've seen several problems posted associated with Yeti microphones and Camtasia. There seems to be some inherent compatibility issues involved.

Good Luck John,

If you resolve this there are other Yeti users that can benefit from your findings. Post back with any updates please.

Regards, Joe

(Edited)
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john

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Im glad to see i am not crazy. I also have a cad mic the same ones this lynda people use. I can try that too. I dont know where i can adjust any hz settings though with the mic. Its pretty much plug and play.

Are there any downsides to recording to avi as oppossed to trec? I do not use mouse effects.

Thanks guys
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Joe Morgan

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None that I'm aware of. Besides, .trec recordings are captured to the AVI format.
You are probably already aware of this but you can play around with the audio settings when capturing to avi.
(Edited)
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john

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never fooled around with that since it was always greyed out with .trec recordings. Now with AVI, I see that I can edit the audio format.  I do lose webcam and computer audio recording though.  I'll give it a shot.  Thanks.
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Kathy Alice Brown

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I ran into this on Camtasia on Mac (using Snowball Blue mike). Lots of popping when I have heavily edited the recordings. Surprisingly, if I "stitch" the media selections the popping appears to go away. Thought I would share.
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Aaron

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Hi John,

Does the issue happen while recording webcam, or microphone only?

When recording to .trec, Camtasia always converts the microphone samples to 44.1 KHz.  You can try to change the microphone's input sample rate and depth using Windows Sound control panel (right-click on the speaker icon in the system tray):



We also released version 9.0.0, will you please see if the issue is present in that version as well? https://www.techsmith.com/camtasia.html

If so, please consider opening a support ticket, and we can take a look at your specific setup, hardware, and files to debug the issue more thoroughly. https://support.techsmith.com/hc/en-us

Thanks and regards,

Aaron
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quinnah

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I am having a similar problem when I import videos with audio recorded by my dslr.
When I play them in any player before I import them into camtasia, they play cleanly, with no audio anomalies. After I import them into Camtasia, there are very noticeable pops throughout the entire track. They are there before doing any editing whatsover - I simply import the file, select play and they are there. When I first noticed it, the problem seemed to be inermittent. Now, it happens with every single video I import. I am using version 8.6.0  I have enjoyed using this software, and have had great results with it for some time. But now, unfortunately with audio anomalies being added to every video I try to work with, it's become useless to me. I have spent time searching for the solution online, but don't see this specific issue addressed anywhere. Please help! 
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Timbre4, Champion

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Hello,

You might check to see if the audio imported is VBR? (variable bit rate - common for iPhone video and other camera video formats) Plays fine natively but erratic time-wise (sync) and/or noise artifacts heard in Camtasia timeline. CBR (constant bit rate) is going to behave properly. There are tools (Handbrake) and methods (gurus will comment) to get this working properly.  In the meantime, try other source material to confirm.

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quinnah

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I haven't used any phone footage. It's all .mov footage recorded with Canon cameras, either 720 or 1080p. 
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Timbre4, Champion

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My suggestion included "other camera video formats"; MOV is quite likely VBR, same as iPhone. What happens is that values fluctuate to optimize the video capture and this impacts the audio. Played natively it's fine; put on an editing timeline and it can be a slippery eel.
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quinnah

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Sorry I missed that phrase in your first reply.

Is it possible the reason you describe would cause intermittent problems, or would it always cause an issue?

At first it was just a video here or there that I would notice the artifacts (popping) in. I initially thought it was something in the room that I hadn't noticed initially. When I started noticing it more frequently, I began to A-B every file I imported, and play each in different players as well.

I'll look into whether the camera is vbr or not, and if that can be changed.

Thanks for the info.
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belatronix

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You see the difference of the noise level between both parts at your cut? This is what you hear in your video. I think this is a normal behaviour. I think at your cutting point there is no zero crossing between the waves.  I have reproduced it in Audacity (look at the generated Sine) and it sounds like your Problem.  I have exported an mp3 file of this. You can hear it at the link: https://drive.google.com/open?id=0B-7rJsVCrc0GVGZYcXZuTmdsdGs
I have done two cuts inside the sinewave. Both at points where no zero crossings are. 
The Pic is of the first pop of the waveform.

 
(Edited)