Hi,
I would stop aQTimer inside a channel callback when the sound finish to play
so I wrote a callback with the flag FMOD_CHANNEL_CALLBACKTYPE_END but it has no effect.
This is the code:

[code:1dn1zl53]FMOD_RESULT F_CALLBACK endCallback(FMOD_CHANNEL *channel,
FMOD_CHANNEL_CALLBACKTYPE type,
unsigned int commanddata1,
unsigned int commanddata2)
{
(void)commanddata1; // Unused (to avoid warnings)
(void)commanddata2; // Unused (to avoid warnings)

switch(type)
{
case FMOD_CHANNEL_CALLBACKTYPE_END:
    {
        std::cout << "In the END callback\n" ;
        FMOD_RESULT result;
        FMOD::Channel *currentChannel = (FMOD::Channel *)channel;

        void *ud = NULL;
        result = currentChannel->getUserData(&ud);
        ERRCHECK(result);

        WaveWidget* currentWave = (WaveWidget*)ud;
        //currentWave->setChannel( NULL ); 
        currentWave->stopTimer();

        break;
    }

default:
    break;
}

return FMOD_OK;

}[/code:1dn1zl53]

I attach the callback to the channel here:
[code:1dn1zl53]FMOD::Channel* AudioDevice::playSound( FMOD::Sound *soundToPlay )
{
FMOD::Channel *channel = NULL;

// play the sound soundToPlay
FMOD_RESULT result = audioSystem->playSound( FMOD_CHANNEL_REUSE, soundToPlay, true, &channel );

// set a callback for the channel
channel->setCallback( (FMOD_CHANNEL_CALLBACK)&endCallback );
ERRCHECK( result );
std::cout << "Result: " << result;

return channel;

}[/code:1dn1zl53]

and I pass the userdata ( in my case a WaveWidget object containing the QTimer I would stop ) so:
[code:1dn1zl53]void WaveWidget::playSound()
{
FMOD_RESULT result;
m_wave->playSound( 0, 0 );
result = m_wave->getCurrentChannel()->setUserData((void*)this); // user data

timer->start( 16 );

}[/code:1dn1zl53]

My code never enter in the callback code even if the sound effectively stop to play.

Where my code is wrong?

Best Regards,
Franco