length expanded size cdr WAVE problems fmt ratio filename 0:39.49 6994892 B --- -- ---xx flac 0.5163 bt2011-10-23t01.flac 3:05.49 32749292 B --- -- ---xx flac 0.5574 bt2011-10-23t02.flac 3:57.66 41962076 B --- -- ---xx flac 0.5513 bt2011-10-23t03.flac 3:22.70 35797484 B --- -- ---xx flac 0.5627 bt2011-10-23t04.flac 3:28.51 36811196 B --- -- ---xx flac 0.5388 bt2011-10-23t05.flac 0:43.27 7648748 B --- -- ---xx flac 0.5059 bt2011-10-23t06.flac 15:18.12 161963688 B 0.5485 (6 files) App\Http\Controllers\Api\FileDownloadController::download(): Return value must be of type string, none returned