audioengine.qml Example File

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 import QtAudioEngine 1.0
 import QtQuick 2.0
 import "content"

 Rectangle {
     color:"white"
     id: root
     width: 300
     height: 500
     property int radius : 100
     property real twoPi : Math.PI + Math.PI

     MyAudioEngine {
         id:audioEngine
         listener.position : Qt.vector3d(observer.x, observer.y, 0);
     }

     Item {
         id: circle
         x: root.width / 2
         y: root.height / 2
         property real percent: 0
         SequentialAnimation on percent {
             id: circleAnim1
             loops: Animation.Infinite
             running: true
             NumberAnimation {
             duration: 12000
             from: 0
             to: 1
             }

         }
     }

     Item {
         id: holder
         x: circle.x - Math.sin(circle.percent * root.twoPi) * root.radius - 50
         y: circle.y + Math.cos(circle.percent * root.twoPi) * root.radius + 50
     }

     Rectangle {
         color:"green"
         id: observer
         width: 16
         height: 16
         x: circle.x - width / 2
         y: circle.y - height / 2
     }
     Rectangle {
         color:"red"
         id: starship
         width: 32
         height: 32
         x: holder.x - width / 2
         y: holder.y - height / 2
     }
     MouseArea {
        anchors.fill: parent
        onClicked: {
            audioEngine.sounds["effects"].play(Qt.vector3d(holder.x, holder.y, 0));
        }
     }

     SoundInstance {
         id: shipSound
         engine:audioEngine
         sound:"shipengine"
         position: Qt.vector3d(holder.x, holder.y, 0)
         direction: {
             var a = (starship.rotation / 360) * root.twoPi;
             return Qt.vector3d(Math.sin(a), -Math.cos(a), 0);
         }
         velocity: {
             var speed = root.twoPi * root.radius / 4;
             return shipSound.direction.times(speed);
         }

         Component.onCompleted: shipSound.play()
    }

     //Category Volume Control
     Rectangle {
         property variant volumeCtrl: audioEngine.categories["sfx"];
         id: volumeBar
         x: 10
         y: 10
         width: 280
         height: 22
         color: "darkgray"
         Rectangle {
             id: volumeTracker
             x: 0
             y: 0
             width: volumeBar.volumeCtrl.volume * parent.width;
             height: parent.height
             color: "lightgreen"
         }
         Text {
             text: " volume:" + Math.round(volumeBar.volumeCtrl.volume * 100) +"%";
             font.pointSize: 16;
             font.italic: true;
             color: "black"
             anchors.fill: parent
         }

         MouseArea {
             anchors.fill: parent
             property bool m:false
             onPressed: {
                 m = true;
                 updateVolume(mouse);
             }
             onReleased: {
                 m = false;
             }

             onPositionChanged: {
                 if (m) {
                     updateVolume(mouse);
                 }
             }
             function updateVolume(mouse) {
                 volumeBar.volumeCtrl.volume = Math.min(1, Math.max(0, mouse.x / (volumeBar.width - 1)));
             }
         }
     }

     //Information display
     Item {
         x:10
         y:32
         Text {
             text: " [live instances] = " + audioEngine.liveInstances;
             font.pointSize: 14;
             font.italic: true;
             color: "black"
             anchors.fill: parent
         }
     }

     Item {
         x:10
         y:60
         Text {
             text: " [loading]=" + (audioEngine.loading ? "true" : "false");
             font.pointSize: 16;
             font.italic: true;
             color: "black"
             anchors.fill: parent
         }
     }
 }