public static function getAudioList() {
        if (self::$_audio) {
            return self::$_audio;
        }

        self::$_audio = self::_getList('audio');

        return self::$_audio;
    }
public static function getAudioList() {
        if (self::$_audio) {
            return self::$_audio;
        }

        self::$_audio = self::_getList('audio');

        return self::$_audio;
    }
public static function getAudioList ( ) { if ( self :: $ _audio ) { return self :: $ _audio ; } self :: $ _audio = self :: _getList ( 'audio' ) ; return self :: $ _audio ; }
Return a list of all audio mime types.

@return array
Return a list of all audio mime types .