length expanded size cdr WAVE problems fmt ratio filename 5:12.58 55173260 B --- -- ---xx flac 0.5613 vc2008-02-02t01.flac 1:52.35 19839164 B --- -- ---xx flac 0.4681 vc2008-02-02t02.flac 5:51.60 62057564 B --- -- ---xx flac 0.5625 vc2008-02-02t03.flac 5:51.20 61963484 B --- -- ---xx flac 0.5931 vc2008-02-02t04.flac 18:48.23 199033472 B 0.5623 (4 files) App\Http\Controllers\Api\FileDownloadController::download(): Return value must be of type string, none returned