length expanded size cdr WAVE problems fmt ratio filename 0:20.36 3612716 B --- -- ---xx flac 0.4921 youngers2014-12-23t01.flac 2:58.08 31418060 B --- -- ---xx flac 0.5196 youngers2014-12-23t02.flac 3:58.19 42027932 B --- -- ---xx flac 0.5035 youngers2014-12-23t03.flac 4:51.52 51454748 B --- -- ---xx flac 0.5134 youngers2014-12-23t04.flac 1:08.26 12056396 B --- -- ---xx flac 0.4981 youngers2014-12-23t05.flac 13:16.66 140569852 B 0.5100 (5 files) App\Http\Controllers\Api\FileDownloadController::download(): Return value must be of type string, none returned