Phonon - Audio-Output-Problem

[nearlyNERD]

Hey,

after many problems, I get phonon "working":

When I click on an area, a 1-second-sound should be played.

My problem is, that I get this warnings and a big latency (1 second or something like this), before playing the sound:

WARNING: Phonon needs QCoreApplication::applicationName to be set to export audio output names through the DBUS interface 
Qt Application(5432) Phonon::KdePlatformPlugin::createBackend: using backend:  "Xine"

WARNING: Phonon needs QCoreApplication::applicationName to be set to export audio output names through the DBUS interface 
Qt Application(5432) Phonon::KdePlatformPlugin::createBackend: using backend:  "Xine"

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My Phonon-specific code is this:

#include <phonon/audiooutput.h>
#include <phonon/path.h>
#include <phonon/mediaobject.h>
#include <phonon/backendcapabilities.h>
 
// .....
 
    Phonon::MediaObject *music =
         Phonon::createPlayer(Phonon::MusicCategory,
                              Phonon::MediaSource("/home/fabi/Desktop/MobileDrumKit/MobileDrumKit/data/Music/15575_lewis_crash_bell.wav"));
     music->play();

#include <phonon/audiooutput.h>
#include <phonon/path.h>
#include <phonon/mediaobject.h>
#include <phonon/backendcapabilities.h>

// .....

    Phonon::MediaObject *music =
         Phonon::createPlayer(Phonon::MusicCategory,
                              Phonon::MediaSource("/home/fabi/Desktop/MobileDrumKit/MobileDrumKit/data/Music/15575_lewis_crash_bell.wav"));
     music->play();

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I also tried to do this :

QList<Phonon::AudioOutputDevice> audioOutputDevices =
    Phonon::BackendCapabilities::availableAudioOutputDevices();
    Phonon::AudioOutput *audioOutput = new Phonon::AudioOutput;
 
    audioOutput->setOutputDevice(audioOutputDevices[0]);

QList<Phonon::AudioOutputDevice> audioOutputDevices =
    Phonon::BackendCapabilities::availableAudioOutputDevices();
    Phonon::AudioOutput *audioOutput = new Phonon::AudioOutput;

    audioOutput->setOutputDevice(audioOutputDevices[0]);

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but no luck...

Thanks in advance.

Also, I want to know, how big the latency between clicking and hear the sound is usually.

[axeljaeger]

Can you make the warning disappear by setting that application name?

[nearlyNERD]

Yes, but only the first one.

The second one and the high latency of 1 second is still here...

[Nickolay]

Also have this problem with latency

[axeljaeger]

Well, the warning says something about the output engine used: "Xine". There has to be a way to select a different output engine. Try that to further boil down the problem to either the backend or the Qt frontend.