Re: [ecasound] file.ewf fading

From: Kai Vehmanen <kvehmanen@email-addr-hidden>
Date: Sat Aug 25 2007 - 23:35:33 EEST


On Fri, 24 Aug 2007, Enzo wrote:

> However something is missing for my use, i don't know how to do this:
> one mp3 begins at volume 100%, than sound decreases linearly to 50%
> after 4seconds then increase linearly to 120% after 30seconds
> Can i do that with an ewf file ?
> If not can i mix the use of ewf file and fading like -kl ? (cause i
> think -kl answers to my need)

ewf can't do this, but yes, you can combine use of ewf files with -kl and
-kl2 operators. And for really compliated cases, you can use -klg (allows
specifying arbitrary number of envelope points).

So you'd have something like:

ecasound -i foo.mp3 -o alsa -ea:100 -kl:1,100,50,4 -ea:100 -kl2:1,100,240,4,30

As the first -ea operator stays at 50% after 4secs point, the second -ea
needs to scale amplification from 100% to 240% (50%*240%=120%) during

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Received on Sun Aug 26 00:15:05 2007

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