[ecasound] eca-control-interface and ecasound console

Hi all,
    I`m writing a c++ player based on ecasound. I`m using jack output
but it paused over 0.5 s when I add a chain operator. I tried the same
commad on a ecasound console and work fine! Someone now wath could be
happen? I paste my code and ecasound console output. Regards:
    Pedro

#include <eca-control-interface.h>
#include <iostream>

int main( int argc, char ** argv )
{

    ECA_CONTROL_INTERFACE ecaplayer;
    ecaplayer.command("cs-add play_chainsetup");
    ecaplayer.command("c-add 1st_chain");

    ecaplayer.command("cs-set-param -G:jack,ecasound,notransport");
    ecaplayer.command("cs-set-param -B:nonrt");
   
    ecaplayer.command("ai-add song.mp3");
    ecaplayer.command("ao-add jack");

    ecaplayer.command("cs-connect");

    std::cout << "start" << std::endl;
    ecaplayer.command("start");

    sleep(3);

    std::cout << "add effect" << std::endl;
    ecaplayer.command("-pn:f_high_and_low");
   
    std::cout << "before sleep" << std::endl;
     sleep(3);
    std::cout << "after sleep" << std::endl;
   
    std::cout << "remove effect" << std::endl;
    ecaplayer.command("cop-index-select 1");
    ecaplayer.command("cop-remove");

    sleep(3);

    std::cout << "stop" << std::endl;
    ecaplayer.command("stop");
    ecaplayer.command("cs-disconnect");

    return(0);
}

$ ecasound -c
********************************************************************************
* ecasound v2.4.4-cvs-20051021 (C) 1997-2005 Kai Vehmanen and others
********************************************************************************
- [ Session created ]
----------------------------------------------------------
- [ Chainsetup created (cmdline) ]
---------------------------------------------
(eca-session) Note! Unable to create a valid chainsetup from the
command-line
... arguments.

ecasound ('h' for help)> cs-add play_chainsetup
- [ Chainsetup created (empty) ]
-----------------------------------------------
(eca-control-objects) Added a new chainsetup with name "play_chainsetup".

ecasound ('h' for help)> c-add 1st_chain
(eca-control-objects) Added chains: 1st_chain.

ecasound ('h' for help)> cs-set-param -G:jack,ecasound,notransport
ecasound ('h' for help)> cs-set-param -B:nonrt
(eca-chainsetup-parser) Buffering mode 'nonrt' selected.

ecasound ('h' for help)> ai-add
/home/pfructuoso/Musica/Musica_Tecno/BonGarcon.mp3
(eca-control-objects) Added audio input
... "/home/pfructuoso/Musica/Musica_Tecno/BonGarcon.mp3".

ecasound ('h' for help)> ao-add jack
(eca-control-objects) Added audio output "jack".

ecasound ('h' for help)> cs-connect
- [ Connecting chainsetup ]
----------------------------------------------------
(eca-chainsetup) 'nonrt' buffering mode selected.
(eca-chainsetup) Audio object
... "/home/pfructuoso/Musica/Musica_Tecno/BonGarcon.mp3", mode
... "read".
(audio-io) Format: s16_le, channels 2, srate 44100, interleaved.
(eca-chainsetup) Audio object "jack", mode "write".
(audio-io) Format: f32_le, channels 2, srate 44100, noninterleaved.
- [ Chainsetup connected ]
-----------------------------------------------------
(eca-control-objects) Connected chainsetup: "play_chainsetup".

ecasound ('h' for help)> start
- [ Controller/Processing started ]
--------------------------------------------
ecasound ('h' for help)> - [ Engine init - Driver start ]
-----------------------------------------------

ecasound ('h' for help)> -pn:f_high_and_low
- [ Controller/Processing stopped (cond) ]
-------------------------------------

ecasound ('h' for help)> cop-index-select 1
ecasound ('h' for help)> cop-remove
- [ Controller/Processing stopped (cond) ]
-------------------------------------

ecasound ('h' for help)> stop
- [ Controller/Processing stopped ]
--------------------------------------------

ecasound ('h' for help)> cs-disconnect
- [ Engine exiting ]
-----------------------------------------------------------
(eca-control-objects) Disconnecting chainsetup: "play_chainsetup".
- [ Chainsetup disconnected ]
--------------------------------------------------

ecasound ('h' for help)> q

---
ecasound: Exiting...
(audioio_jack_manager) Connection closed!
-------------------------------------------------------
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