Fadeout parameter in % or ms (for multiple files processing)

[magnetique]

Hello,

first of all BIG thanks to the developers of AUDACITY!

I would like to fade-out for example the last 5% of the track or only xx ms at the end. This can be easily done manually but unfortunately I have over 1000 tracks to do this way.

Could someone recommend me a how to do that?

I can create a chain for batch processing but still without the possibility to edit Fade-Out parameter to let it fade-out only the last 5% of the track. (or xx ms at the end)
Or if there would be a command in chain to select last 5% of the track, then I could just use normal Fade-Out command without any change, but there is no select command...

Any tips are more than welcome!
Thanks

[kozikowski]

<<<fade-out only the last 5% of the track.>>>

Do you really want a two-hour long track for fade out for six minutes?

Just wondering...

Koz

[magnetique]

Hello Koz,

no, I have 1000 short samples with duration few seconds and would like to fade-out only the end of each of them.

Any solution please?

[waxcylinder]

just select the sections you need to fade - use the cursour to click&drag to mage the selection. Then use Effect > Fade Out. Repeat for the next fade ...

WC

[magnetique]

just select the sections you need to fade - use the cursour to click&drag to mage the selection. Then use Effect > Fade Out. Repeat for the next fade ...

WC

Do you mean REPEAT 1000 times? Try it yourself!
Would like to use batch processing!

[steve]

If all the files are the same length then you could import multiple files, then select the last 5% in all files and apply the fade, then use Export Multiple (based on tracks) to export the files. If you intend to try this method I would suggest trying it with just a couple of tracks, then if successful build up the number of tracks.

If the files are different lengths then the only method that I can think of is to use a program like AutoHotkey for the automation. I don't know if this will work as I don't usually use Windows software.

[waxcylinder]

... Do you mean REPEAT 1000 times? Try it yourself!

Aaaahhh, I see

[magnetique]

thanks stevethefiddle, but unfortunately the files are not the same length
it seems that I need to use some paid application then...

[steve]

AutoHotkeys is free and open source.
I've not come across any audio editors (free or paid) that can batch process files in that way. Perhaps if you find one that can do this (and works) you could let us know.

[Edgar]

One of the joys of Audacity is that it is open source. It is fairly easy to turn the GUI off and set Audacity up for batch processing from the command line. Do you do any programming? If so, you should try to compile Audacity for yourself. If you can get Audacity (and the required wxWidgets) to compile on your system and you are familiar with C++ (or any language and willing to learn a little bit of C++) you could probably accomplish your goal here. Most of the code that you need to change is really only a matter of commenting out those places which ask for user intervention and hard coding the values. In another thread I posted all the steps (including all of the code) which you would need to follow. The only part missing would be the actual fadeout code itself which should not be too difficult.