static function unlockSound(): Void {
        if (!soundEnabled) {
            var context = kha.audio2.Audio._context;

            if (context == null) {
                context = untyped __js__('kha_audio2_Audio1._context');
            }

            if (context != null) {
                context.resume().then(function (c) {
                    soundEnabled = true;
                    // trace('sound enabled');
                }).catchError(function( err ) {
                    trace(err);
                });
            }
        }
        unlockiOSSound();
    }