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jonobacon
Asked: 2013-08-27 13:43:00 +0800 CST

Fade in or out a QML Audio file?

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I have a QML Audio element in my app that plays a sound. When I click a button I execute:

audio.play()

and when I click it again I execute:

audio.stop()

Ideally I would like to fade the sound in a little when the user clicks the button to play the sound, and fade it out a little when they press the button to stop the sound.

How do I do this?

sound

2 Answers

  1. I don't know how to program QML, but here is something I found in the documentation

    volumeCtrl.volume = Math.min(1, Math.max(0, mouse.x / (volumeBar.width - 1)));

    Source : http://qt-project.org/doc/qt-5.0/qtmultimedia/multimedia-audioengine-qml-audioengine-qml.html

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  2. Use a number or property animation. 

    NumberAnimation{ id:audiofadeout; target: audioFile; property: "volume"; from:1; to: 0; duration:1000 }

    Then execute w/

    audiofadeout.start()

    

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