How to MUTE all buttons instances sounds?

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Hi friends,I am new here and have not much knowledge about AS but know some basic… i have an older source file of a project which has a lot of buttons symbols / instances and each button symbol has sound file imported from library on press state. i want them all MUTE from another button, i searched alot and found this code!var globalVolume:Sound = new Sound();btnSoundOff.onRelease = function():Void { globalVolume.setVolume(0);}btnSoundOn.onRelease = function():Void { globalVolume.setVolume(100);}it is working as long as any sound file is present in timeline , but it is unable to MUTE all sounds present behind all button instances…guys … please advise how can I achieve this?Thanks