Re: [ecasound] Automated volume change

Pedro,

Thank you very much for your answer.

I'm looking for a easier solution because Tkeca don't use external
libraries, Tkeca build a command line string for Ecasound, so I'm
looking for a command line alternative.

Regards,

Luis Pablo

Pedro Antonio Fructuoso Merino wrote:

> Hi Luis Pablo:
> I don't know if you can do it with -km but in ecasound control
> interface guide
> <http://www.eca.cx/ecasound/Documentation/programmers_guide/html_ecidoc/eci_doc.html>
> you have an example about how you can do it. In this code use the
> chain operator -efl, but if you change it work fine. After that, I
> copy&paste the c++ code.
>
>#include <iostream>
>#include <unistd.h>
>#include <eca-control-interface.h>
>
>int main(int argc, char *argv[])
>{
> double cutoff_inc = 500.0;
>
> ECA_CONTROL_INTERFACE e;
> e.command("cs-add play_chainsetup");
> e.command("c-add 1st_chain");
> e.command("ai-add some_file.wav");
> e.command("ao-add /dev/dsp");
> e.command("cop-add -efl:100");
> e.command("cop-select 1");
> e.command("copp-select 1");
> e.command("cs-connect");
> e.command("start");
> while(1) {
> sleep(1);
> e.command("engine-status");
> if (e.last_string() != "running") break;
> e.command("get-position");
> double curpos = e.last_float();
> if (curpos > 15.0) break;
> e.command("copp-get");
> double next_cutoff = cutoff_inc + e.last_float();
> e.command_float_arg("copp-set", next_cutoff);
> }
>
> e.command("stop");
> e.command("cs-disconnect");
> e.command("cop-status");
> cerr << "Chain operator status: " << e.last_string() << endl;
>
> return(0);
>}
>
>
>
> Luis Pablo Gasparotto escribió:
>
>> Hi folks,
>>
>> I would like to know if there's some way to change, as an example,
>> the volume (-ea) parameter in a certain time position.
>>
>> Example:
>> ecasound -i:test.wav -ea:100
>> and I would like -ea:120 at the 5 seconds position.
>>
>> May I do it using -km?
>>
>> I'm curious about it because I think It would be a useful feature for
>> Tkeca.
>>
>> Thank you in advance,
>>
>> Luis Pablo
>>
>>
>>
>>
>>
>>
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>

        
                
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Received on Sat Sep 3 08:15:04 2005