Audio Blip test revisited

[lata]

Hi
Ref this post
https://forum.corel.com/viewtopic.php?f=1&t=67367

With the recent comments regarding audio blips I found test vsp’s from 2018, the tests would replicate the blip which occurs at the end of an audio clip after applying fade out.
As the test vsp was made with an earlier version I did not want to open original with 2020
I have two options, create a copy or use nesting where I drag a VSP from the library to the timeline.
A few tests using a copy the blips still showed, then I tried nesting as that option would use a 2020 vsp and not the 2018 version.
To my surprise there were no blips. A little further investigation showed the frame rate had changed from 29.97fps to 30fps.
All tests using 30fps were clear of the blips, so far that is.

As I live in the UK so now I set the project properties to use 25fps, again no blips.
Reverted the project properties to use 29.97fps and the blips are back again.


Test File attached
By the way i rendered to Share - Audio - Wav, renders much quicker than creating a video.

Audio Blips 2018 revisited.zip

(3.21 MiB) Downloaded 59 times

[tletter]

A little further investigation showed the frame rate had changed from 29.97fps to 30fps ... By the way i rendered to Share - Audio - Wav, renders much quicker than creating a video.

If you rendered as a WAV, how did you change the video frame rate of the rendered audio file?

In any event, the following image shows your VSP rendered as a WAV both with and without a final fade-out. As clearly seen in the enclosed image, the final fade-out causes the audio blip. The problem is that VS doesn't properly perform a fade-out. Perhaps it's related to VS's inability to actually reduce the audio level to 0 rather than -36. However, the bottomline is that VS has a serious audio bug that Corel has ignored for years (see https://forum.corel.com/viewtopic.php?f ... 20#p349842).

tletter
https://www.youtube.com/user/tletter

[lata]

Hi
I am referring to the project properties fame rate, when set to 29.97fps and using my test files it creates a blip, but when using 30 or 25 fps there is no blip.
Yes we need to have a fade out, but that in its self will not cause a blip otherwise every instance of fade would cause the blip and its not easy to replicate. In some way the problem is associated in the way the clips are set on the timeline. If you rearrange/move the clips on my sample VSP the chance is that no blips will be created.

It does not matter what format i use to render the project although some blips show more with some formats, Audio was used as its quick when running tests

If you have a sample project that shows the blip can you provide, thanks.

[tletter]

Yes we need to have a fade out, but that in its self will not cause a blip otherwise every instance of fade would cause the blip

We don't need to have a fade-out as it's totally user configurable, i.e. we can select or deselect a fade-out. Your VSP shows that the final fade-out will cause an audio blip as seen in the previous image. However, you can test that for yourself.

It's not true that "every instance of fade would cause the blip", since it's clearly dependent on interaction between the final 1 second of an audio clip and Corel's fade-out algorithm. Perhaps we can agree that not every audio clip has the same waveform in the final 1 second.

tletter
https://www.youtube.com/user/tletter

[lata]

Do you have a VSP sample that shows a blip that i can test.

[tletter]

Do you have a VSP sample that shows a blip that i can test.

Attached is a VS2018 VSP that when rendered as a WAV file will produce an audio blip. The problem is clearly that VS is not properly implementing a fade-out. The audio blip is completely independent of whether the FPS is set to 29.97 or 30.

Too bad that Corel has ignored audio problem for years.

tletter
https://www.youtube.com/user/tletter

[lata]

Too bad that Corel provided a hot fix to be used / tested by the members here, one installed others refusing to do so as they were working on a project.
That was back using X10

I'll have a look at the project you provided and compare with the layout of my project.

OK
I was hoping that you had a project that contained your own clips that had this problem and not simply provide me with my own files
You simply renamed my early_bird2-12.mp3 to render-as-WAV.mp3

Do you have any of your own projects using your files that show the blip problem.

Interesting that the 29fps version has one extra frame at the end where the blip shows.

[tletter]

Too bad that Corel provided a hot fix to be used / tested by the members here, one installed others refusing to do so as they were working on a project. That was back using X10

If Corel actually had a "fix" then it would have been incorporated into new versions of VS going forward from X10, e.g. VS2018, etc., but this wasn't done

Do you have any of your own projects using your files that show the blip problem.

The modified VSP that I provided clearly shows how audio blips are created regardless whether the video frame rate is set to 29.97 or 30. If this isn't sufficient to help Corel at least understand the issue then nothing will.

tletter
https://www.youtube.com/user/tletter

[lata]

Hi tletter
There was a hot fix provided by the Corel Development Team for us to test, it was not provided for the general public.
I was asked to provide on a case by case basis, and if successful would have been provided as part of a ServicePack.
I sent out e-mails containing the fix which was to be used only for CVS X10.5
As far as I remember nobody took up the challenge to apply that fix.
I did of course use it and it did correct some blips but not all.
https://forum.corel.com/viewtopic.php?p=347587#p347587

As for the frame rate using 29 or 30fps my image clearly shows a different result to what you are experiencing.
I continues testing using 2020 which did not show any blips using 30 or 25 fps only 29 caused the issue.
I am sure we are singing from the same songbook even if there is some confusion --- testing for VS 2021 will start later this year, (Nov) certainly I will be raising the issue again as I have done in the last few versions.
I do know that using X7 had no problems with blips, so the problem has been around for a while.

[tletter]

There was a hot fix provided by the Corel Development Team for us to test, it was not provided for the general public ... As far as I remember nobody took up the challenge to apply that fix.

Actually, as explained on this forum 3 years ago, I tried that hotfix (see https://forum.corel.com/search.php?keyw ... g!&t=61761), however, it didn't fix the audio blips on the music tracks. FWIW, my copy of X10.5 has been running the DLLs provided in that hotfix since 2017 but audio blips still frequently occur.

testing for VS 2021 will start later this year, (Nov) certainly I will be raising the issue again as I have done in the last few versions.

It would be nice if Corel treated VS2021 as a maintenance release to fix longstanding issues such as instability including silent crashes, corruption when saving VSPs, audio blips, lack of diagnostic logging, and slow rendering times despite the use of modern CPU & GPU. However, it's more likely that Corel will simply add more features and tweak the interface.

I do know that using X7 had no problems with blips.

Unfortunately X7 can't render VSPs created in VS2018 or even X10 since they can only export down to the X8 format. In any event, certain features/filters available in VS2018 and X10 wouldn't be available in X7 so the exported VSP couldn't be properly rendered anyway.

tletter
https://www.youtube.com/user/tletter

[Butcher]

I had this posted elsewhere on the forum but thought it might pertain to some of your Audio Problems. "I would really like Corel to Fix the Audio problem of not being able to fade to silence, which it can't do. -36 is not silence. Audio not fading to silence is the same as using Fade to Black in Video and there is still a visible video playing. Why is it so difficult to fix. This feature is available on just about every piece of Audio/Video software available today including Free software. I think Corel should get someone on board that understands Audio and how important it is in a Video editing package." "Another new update and still no fix for the Fade to Silence problem. I also just noticed on one of the Forums that this has been an issue since 2007 so I guess that means that Corel has No intention of fixing this. Absolutely ridiculous, they can't fix errors reported in 2007 and you can bet these errors will be in 2021 Version." Mark