Background MIDI playback in iOS

MacOSX and iOS
5

OK, this is the solution I've found, also thanks to this post. Please Jules, do you confirm this is a safe way to do this?

I have added this to my app class header:

#if defined(JUCE_IOS)
    AudioDeviceManager   f_AudioDeviceManager;
    AudioSourcePlayer    f_FakeAudioSourcePlayer;
#endif

void  suspended ();
void  resumed   ();

and this to the implementation:

void App::initialize()
{
...
#if defined(JUCE_IOS)
   f_AudioDeviceManager.initialiseWithDefaultDevices(0, 1);
#endif
...
}
void App::shutdown()
{
...
#if defined(JUCE_IOS)
   f_AudioDeviceManager.removeAudioCallback(&f_FakeAudioSourcePlayer);
#endif
...
}

void App::suspended()
{
#if defined(JUCE_IOS)
    f_AudioDeviceManager.addAudioCallback(&f_FakeAudioSourcePlayer);
#endif
}

void App::resumed()
{
#if defined(JUCE_IOS)
    f_AudioDeviceManager.removeAudioCallback(&f_FakeAudioSourcePlayer);
#endif
}