length expanded size cdr WAVE problems fmt ratio filename 4:51.38 51421820 B --- -- ---xx flac 0.5174 keller1999-08-29s1t01.flac 2:45.63 29254220 B --- -- ---xx flac 0.5016 keller1999-08-29s1t02.flac 5:02.23 53326940 B --- -- ---xx flac 0.4711 keller1999-08-29s1t03.flac 12:39.49 134002980 B 0.4955 (3 files) App\Http\Controllers\Api\FileDownloadController::download(): Return value must be of type string, none returned