length expanded size cdr WAVE problems fmt ratio filename 8:37.49 91314092 B --- -- ----- wav 1.0000 WUL_2014_02-08_D201.wav 4:57.00 52390844 B --- -- ----- wav 1.0000 WUL_2014_02-08_D202.wav 7:44.66 82004876 B --- -- ----- wav 1.0000 WUL_2014_02-08_D203.wav 4:14.35 44887964 B --- -- ----- wav 1.0000 WUL_2014_02-08_D204.wav 5:02.19 53317532 B --- -- ----- wav 1.0000 WUL_2014_02-08_D205.wav 7:25.22 78549788 B --- -- ----- wav 1.0000 WUL_2014_02-08_D206.wav 5:55.60 62763164 B --- -- ----- wav 1.0000 WUL_2014_02-08_D207.wav 46:17.13 1167270300 B 1.0000 (7 files) App\Http\Controllers\Api\FileDownloadController::download(): Return value must be of type string, none returned