length expanded size cdr WAVE problems fmt ratio filename 7:15.46 76842236 B --- -- ---xx flac 0.5183 sf2000-05-14s1t01.flac 9:44.34 103097612 B --- -- ---xx flac 0.5227 sf2000-05-14s1t02.flac 14:09.55 149893004 B --- -- ---xx flac 0.5233 sf2000-05-14s1t03.flac 6:01.09 63701612 B --- -- ---xx flac 0.5294 sf2000-05-14s1t04.flac 16:27.48 174220508 B --- -- ---xx flac 0.5329 sf2000-05-14s1t05.flac 53:38.42 567754972 B 0.5261 (5 files) App\Http\Controllers\Api\FileDownloadController::download(): Return value must be of type string, none returned