@Anthony-Abboud for the crackling sound issue, I could fix my issues with https://codereview.qt-project.org/c/qt/qtmultimedia/+/503818 and this is such a generic error that I expect that you hit the same problem.
For the missing sound output, the following changed helped me https://codereview.qt-project.org/c/qt/qtmultimedia/+/503819 . Yet for that I am not sure yet if it is a proper solution or just a workaround.

And the setBuffer() function you use has exact the same problem.

Ok, I found a solution to my problem. This is the PlaySound method from my SoundEffect class. The area of interest is the code below the note.

void SoundEffect::PlaySound() { mPlayer.setSource(soundUrl); // Note about QMediaPlayer::Loops // Using QMediaPlayer::Loops::Infinite does not work correctly on Linux and Windows. // It either plays once and then stops or plays multiple times, but stops unexpectedly. // Therefore, use QMediaPlayer::Loops::Once and connect to the playbackStateChanged signal. // The slot will reset the QMediaPlayer and play the sound again. mPlayer.setLoops(QMediaPlayer::Loops::Once); connect(&mPlayer, &QMediaPlayer::playbackStateChanged, this, [this, soundUrl](QMediaPlayer::PlaybackState aState) { if (aState == QMediaPlayer::PlaybackState::StoppedState) { // Clear the source mPlayer.setSource(QUrl()); // Restore the source mPlayer.setSource(soundUrl); mPlayer.play(); } }); mPlayer.play(); }

@SGaist Yes that was what I was trying. But I found the error. SampleFormat was set to Unknown instead of Int16. Now I only need to syncronize and write audio in the right rate

Can you share the code you are using ?
Do you get any warning about a timer being in the wrong thread ?

@sgaist Yep, I added a link to stack overflow. Concerning vlc I already looked at it but sadly there is some major drawbacks :

-the documentation is poor or inexistant.
-it does not allow fine tuning what you want at compile time as much as ffmpeg allows it (to reduce shared libs size).
-it is partially based on ffmpeg anyway and I try to reduce as much as possible the amont of dependencies (for future compatibility and maintaining on my free time).

Again thank you so much for the quick replies and the mailing list 🤩.

Thank you, @Diracsbracket. From what you have commented I have achieved my audio playback of raw audio data.

Although the raw audio format is 32bits, and the supported formats indicated that 32 bits was supported, in actuality for my windows OS, i think only 8 bit Unsigned Int or 16 bit Signed Int work.

I'd say probably, but right now I don't know what might be interfering here to trigger that message.

I just created an empty project to test some stuff. The following code

QAudioDeviceInfo info = QAudioDeviceInfo::defaultInputDevice(); // Empty string as output qDebug() << "Default input device" << info.deviceName(); // 0 as output qDebug() << QAudioDeviceInfo::availableDevices(QAudio::AudioInput).size(); // 0 as output qDebug() << QAudioDeviceInfo::availableDevices(QAudio::AudioOutput).size();

prints an empty string as input device, 0 available devices on WinRT. 'multimedia' is added as Qt module.
What could be wrong? A missing plugin (dll not deployed automatically)? Or is WinRT not supported (yet)?

Best
Wickie