length expanded size cdr WAVE problems fmt ratio filename 4:03.48 42978140 B --- -- ---xx flac 0.5119 sharonvanetten2012-05-28t01.flac 3:23.65 35962124 B --- -- ---xx flac 0.7094 sharonvanetten2012-05-28t02.flac 7:27.38 78940264 B 0.6019 (2 files) App\Http\Controllers\Api\FileDownloadController::download(): Return value must be of type string, none returned