length expanded size cdr WAVE problems fmt ratio filename 16:13.72 171806588 B --- -- ---xx flac 0.4919 cats2018-04-06T01.flac 20:32.71 217491836 B --- -- ---xx flac 0.5209 cats2018-04-06T02.flac 12:00.67 127165628 B --- -- ---xx flac 0.5193 cats2018-04-06T03.flac 16:04.12 170077868 B --- -- ---xx flac 0.5192 cats2018-04-06T04.flac 14:09.03 149770700 B --- -- ---xx flac 0.5238 cats2018-04-06T05.flac 13:45.72 145699388 B --- -- ---xx flac 0.5313 cats2018-04-06T06.flac 24:31.39 259576172 B --- -- ---xx flac 0.5203 cats2018-04-06T07.flac 18:01.55 190817804 B --- -- ---xx flac 0.5395 cats2018-04-06T08.flac 135:20.16 1432405984 B 0.5208 (8 files) App\Http\Controllers\Api\FileDownloadController::download(): Return value must be of type string, none returned