AudioCategory QML Type

Control all active sound instances by group. More...

Import Statement: import QtAudioEngine 1.1
Since: Qt 5.0




Detailed Description

An instance of AudioCategory can be accessed through AudioEngine.categories with its unique name and must be defined inside AudioEngine or be added to it using AudioEngine.addAudioCategory() if AudioCategory is created dynamically.

Rectangle {
    width: 300
    height: 500

    AudioEngine {

        AudioCategory {
            name: "sfx"
            volume: 0.8

        AudioSample {
            source: "explosion-02.wav"

        Sound {
            category: "sfx"
            PlayVariation {

    MouseArea {
        anchors.fill: parent
        onPressed: {
            audioengine.categories["sfx"].volume = 0.5;

Sound instances can be grouped together by specifying the category property. When you change the volume of a category, all audio output from related instances will be affected as well.

Note: there will always be an AudioCategory named default whether you explicitly define it or not. If you do not specify any category for a Sound, it will be grouped into the default category.

Property Documentation

name : string

This property holds the name of AudioCategory. The name must be unique among all categories and only defined once. The name cannot be changed after the instance has been initialized.

volume : real

This property holds the volume of the category and will modulate all audio output from the instances which belong to this category.

Method Documentation


Resumes all active sound instances from paused state which belong to this category.


Pauses all active sound instances which belong to this category.


Stops all active sound instances which belong to this category.

© 2016 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.