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X9 Pro audio fade out causes scratchy blip

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X9 Pro audio fade out causes scratchy blip

Postby cdoughertycd » Wed May 10, 2017 5:16 am

Hi:

This doesn't happen all the time but with X9 Pro when I fade audio at the end of a clip to the next one usually with crossfade I sometimes get a little scratchy blip. This also happens at the end of a video when I fade out when there's no clip to continue to. I think I read it has to do with the volume difference between the two clips, so I've been lowering the very end of offending audio to mute, dragging the slider. I don't solve it every time, and it also happens occasionally at the end of the video. I can't figure out what causes it.

Any other ideas? It's like the mute I try at the end doesn't really mute it completely, leaving this scratchy annoying blip.

Thanks for your help,

Candy Dougherty
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Re: X9 Pro audio fade out causes scratchy blip

Postby MrJohnny » Wed May 10, 2017 6:40 am

Hi Candy

Do not know what is causing the scratchy blip (click?) but try selecting the clip with the audio glitch on the Timeline, right click with the mouse, select Audio Filter. There is an option Clicks Removal.

There are a number of other work arounds that spring to mind, but nothing elegant.

John
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Re: X9 Pro audio fade out causes scratchy blip

Postby cdoughertycd » Wed May 10, 2017 8:13 am

Thanks John, I will try that, will let you know.
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Re: X9 Pro audio fade out causes scratchy blip

Postby cdoughertycd » Wed May 10, 2017 11:03 am

John: I used the audio filter clicks removal at default 10%, still getting clicks, should I up the percentage, or do you know another work around?

Thanks

Candy
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Re: X9 Pro audio fade out causes scratchy blip

Postby MrJohnny » Wed May 10, 2017 1:31 pm

Hi Candy

The short answer to your first question wrt increasing the %age Clicks Removal is – I don't know. But, try playing around with the %age, it may make a difference.

OK, other work arounds (these are at best clunky):

1 Create an empty audio.wav file ie an empty file without a wave pattern. For example use Audacity to export a Silence.wav file, Suggest you import a piece of music, highlight it in Audicity and delete it, then export the empty audio line to Silence.wav. This can then be appended to the VS Timeline (music track), shortened as necessary. Use the VS audio rubber band (Sound Mixer) to introduce an audio node somewhere before the end of the actual audio associated with the end clip. Go to the end node and pull down to zero sound.

Or

2 Highlight the end clip on the Timeline, split the audio from it. The split audio appears in the Voice Over Track. Overlap the Silence.wav file with it. The default Audio Transition (Cross Fade) as set in Preferences will be applied. This method can be adapted to use where audio glitches appear between clips too.

Or

3 In VS, finish the edit , then render the project to an intermediate file, blips and all. Re-import the intermediate file and using the Sound Mixer identify the blips and deal with accordingly.

Etc. etc, and etc.

The other contributors will most likely have better and more succinct ways of dealing with glitches.

John
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Re: X9 Pro audio fade out causes scratchy blip

Postby cdoughertycd » Wed May 10, 2017 4:29 pm

John, thanks for these. I'll try them. Appreciate it very much.

Candy
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Re: X9 Pro audio fade out causes scratchy blip

Postby aljimenez » Wed May 10, 2017 7:09 pm

MrJohnny wrote:The other contributors will most likely have better and more succinct ways of dealing with glitches.
John

Even this experienced user learned from your tips and certainly don't have any better ones. Thanks for sharing your clever ideas.
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Re: X9 Pro audio fade out causes scratchy blip

Postby MrJohnny » Wed May 10, 2017 11:09 pm

aljimenez

Thank you.

(PS California is a beautiful place.)

John
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Re: X9 Pro audio fade out causes scratchy blip

Postby cdoughertycd » Thu May 11, 2017 4:23 am

I did some volume adjustment at the ends of offending fades, got rid of two of them but couldn't fix three but now I'm just going to use what I have, not offensive enough to warrant more work on it and I'm running out of time. I might be the only one who notices hopefully. This is a youth orchestra concert in Pasadena.

Nice to talk to two people in California, rare on this forum to be in same time zone.

Thanks for your help John.

Candy
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Re: X9 Pro audio fade out causes scratchy blip

Postby lata » Thu May 11, 2017 9:19 am

Hi Candy

When we mute of fade out a clip that does not go to zero sound there is a 40db lower limit.

Not sure if a clip has a high sound level on the last few frames affects the fade.
So if your clips volume is rising towards the end then the fade may not give a full effect.

Have you viewed the volume on the ends, if it is high, try cutting a few frames from the end.

Just a thought

The lower DB level of 40 has been raised with Corel but to date remains the same.
Regards Trevor
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Re: X9 Pro audio fade out causes scratchy blip

Postby cdoughertycd » Thu May 11, 2017 10:10 pm

Hi Trevor

Thanks for your input on this. Every year you get to help me with something, lol.

What I'm trying to fade to mute is loud clapping. The audio engineer did not record the clapping to its die-down. I did record the die-down audio with the video camera. What I could do is split out the audio from the video that includes the die-down and apply that to the end of the audio track and then do the fade to mute, or switch to the video audio on the video track. It's tricky and more work and takes time. I did actually do that for the clapping end of the concert due to the audio engineer had cut it short. That worked but it took some time to get the volume levels to match at that switch point. Volume levels are high at the clapping ends of each piece, it takes too long to wait for the die-down.

Can you clarify for me, the lower 40 db limit means when the end volume is high, the audio fade does not go to zero? Did I get that right? Do you think most other video editing software would have that same limitation or there is more expensive software that would go to zero?

Again, thanks for your input. You've helped me figure out what to do, and also thanks to John.

Candy
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Re: X9 Pro audio fade out causes scratchy blip

Postby lata » Fri May 12, 2017 9:08 am

Hi

If you go to the sound mixer the volume level (left hand slider) lower level is -36.
Also if you right click the clip and set volume level from 100 to 0, the sounds are effectively muted. The same levels are applied when using Fades.

If you listen to a clip set to Volume 0 you can still hear a little sound, if the source audio is high I suspect this may be heard, especially if the next clip is silent.
Regards Trevor
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Re: X9 Pro audio fade out causes scratchy blip

Postby cdoughertycd » Fri May 12, 2017 9:36 am

Trevor, thanks for you reply.

Candy
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Re: X9 Pro audio fade out causes scratchy blip

Postby aljimenez » Fri May 12, 2017 4:16 pm

Couldn't you just cut that portion of the audio clip that you want to have volume 0?
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Re: X9 Pro audio fade out causes scratchy blip

Postby cdoughertycd » Sat May 13, 2017 1:01 am

Aljimenez - What I'm doing is dealing with loud clapping at the end of an orchestra music performance, trying to fade it to mute. I have no break in loud clapping for cutting due to I want the audience clapping. If I leaving the video/audio clapping in until the audience quits clapping it takes too long for the amount of time I want to allow for clapping. I'm going to be burning DVDs of a 1.5 hr long performance and need to make it as short as possible, and I want to allow time for end credits. According to what Trevor says the mute to fade out only goes to 40db at the most silent from high volume to lower on the fade. Would be so good if Corel could make the fade go to complete zero when it's coming from high db. I have it work ok when the clapping is light or the audience has stopped, but usually their clapping is longer than I want. (Trevor, I hope I got this right.)

Hope this explains it.

Candy
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