length expanded size cdr WAVE problems fmt ratio filename 9:20.01 98786396 B --- -- ----- wav 1.0000 PC_2016-07-22_S101.wav 4:41.19 49613132 B --- -- ----- wav 1.0000 PC_2016-07-22_S102.wav 4:12.27 44516348 B --- -- ----- wav 1.0000 PC_2016-07-22_S103.wav 4:15.55 45111404 B --- -- ----- wav 1.0000 PC_2016-07-22_S104.wav 4:08.42 43846028 B --- -- ----- wav 1.0000 PC_2016-07-22_S105.wav 5:10.24 54740492 B --- -- ----- wav 1.0000 PC_2016-07-22_S106.wav 5:26.31 57579356 B --- -- ----- wav 1.0000 PC_2016-07-22_S107.wav 4:48.38 50892620 B --- -- ----- wav 1.0000 PC_2016-07-22_S108.wav 42:03.12 445085776 B 1.0000 (8 files) App\Http\Controllers\Api\FileDownloadController::download(): Return value must be of type string, none returned