How do I do a partial fade?

Grenache · Post by **Grenache** » Mon Aug 27, 2012 7:32 pm

Hello,

I've just joined to forum but have been lurking for a while. First of all, I must say that Audacity is such a great program! I used to use CoolEdit 96 many years ago, and find that Audacity does almost all of what I need.

But there is one thing that I can't figure out how to do, and I'm hoping someone here can help me.

I have Audacity 2.0.0. on Windows 7.

I'm editing a stereo file, and want to change the level within a selection. If I create a selection, I can Amplify, or select Fade In or Fade Out, for example. But what I cannot work out how to do is do a partial fade, starting at 100% and ending, say at 50% rather than fading out to 0% of the original volume.

How does this fit into real life? Here's an example of how I would use it. If I'm editing some classical music and I want to artificially (and manually) raise the level of a passage of music that gradually increases in volume, I might start with section A to B and amplify that by +3db. But section B to C needs to be amplified and faded to start at +3db and end at 0db (100% of the original level) so that the transition is smooth into section C to D which remains at the original level.

In CoolEdit, I would have created the selection and set the start level to 125% and end level to 100% and it's as easy as a couple of mouse clicks. But I can't see any easy way in Audacity - unless of course it's right under my nose and I've missed the obvious!

Thanks for your help.

Post by **kozikowski** » Tue Aug 28, 2012 1:35 am

Audacity has the Envelope Tool, two white arrows and bent blue line.

That will give you steering rubber bands top and bottom of a track. Push the rubber bands around to change any volume to any value any time.

Crossfade example.

http://kozco.com/tech/audacity/pix/CrossFade.jpg

Koz

Post by **Gale Andrews** » Tue Aug 28, 2012 2:26 am

Also try the Fade by dB plug-in ( http://forum.audacityteam.org/viewtopic ... 22#p104922 ) .

If you want % units you will have to try Text Envelope:
http://wiki.audacityteam.org/wiki/Nyqui ... t_Envelope .

Gale

Grenache · Post by **Grenache** » Tue Aug 28, 2012 9:17 pm

Hi,

Thank you both for your fast responses, both useful. I tried the Fade by db plugin and it seems to be the easiest way of doing what I want.

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How do I do a partial fade?

How do I do a partial fade?

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