Re: newbee want mixing a 3 channel wav file

On Wed, Sep 14, 2011 at 06:45:48PM +0200, Willy WOLFF wrote:
> Hi,
> 
> I would like to mixing a 3 channel wav file with :
> - first track of wave file 90% left panning
> - second --------------- 50-50 pan
> - third 90% right panning and amplifing 300%
> and finaly output to one stereo wav file.
> 
> This is my command, but doesn't wath i want :
> 
> ecasound -a:1,2,3 -f:,3 -i tm-2011-09-12T22\:10\:46.wav \
>     -a:1 -epp:10 \
>     -a:2 -epp:50 \
>     -a:3 -epp:90 -ea:300 \
>     -a:all -f:,2 -o final.wav

> On right channel, i have second and third track amplified. I only want
> third track amplified. Wath's wrong?
 
Hi WW,

With your current Ecasound setup, each chain a:1, a:2, a:3
is getting the entire signal, i.e. all three channels.

-epp operates on the first two channels, so 
you need to copy each individual signal to stereo.

Here is what I believe you need to do (not tested.)

ecasound -a:1,2,3 -f:,3 -i tm-2011-09-12T22\:10\:46.wav \
    -a:1 -chcopy:1,2 -epp:10 \
    -a:2 -chcopy:2,1 -epp:50 \
    -a:3 -chcopy:3,1 -chcopy:3,2 -epp:90 -ea:300 \
    -a:all -f:,2 -o final.wav

Best,

Joel
 
> Thanks.
> 
> ps: i am french man, i know my english is saddly poor ...
> 
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-- 
Joel Roth

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