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    $line = '"'.$data{title}.'","'.$data{album}.'","'.$data{artist}.'"
+,"'.$data{songStationName}.'"';
...
        $line .= ',"' . $data{coverArt} . '"' ;
    }
    $line .= "\n";

    my @values = map { $data{$_} } qw/title album artist .../;
    $csv->combine(@values);
    $line = $csv->string();