length expanded size cdr WAVE problems fmt ratio filename 7:01.18 74306780 B --- -- ----- wav 1.0000 TF_2017-02-05_S101.wav 4:39.10 49239164 B --- -- ----- wav 1.0000 TF_2017-02-05_S102.wav 6:26.70 68255084 B --- -- ----- wav 1.0000 TF_2017-02-05_S103.wav 5:30.17 58252028 B --- -- ----- wav 1.0000 TF_2017-02-05_S104.wav 8:28.02 89615948 B --- -- ----- wav 1.0000 TF_2017-02-05_S105.wav 7:20.11 77641916 B --- -- ----- wav 1.0000 TF_2017-02-05_S106.wav 10:43.35 113507564 B --- -- ----- wav 1.0000 TF_2017-02-05_S107.wav 4:58.29 52635452 B --- -- ----- wav 1.0000 TF_2017-02-05_S108.wav 55:07.42 583453936 B 1.0000 (8 files) App\Http\Controllers\Api\FileDownloadController::download(): Return value must be of type string, none returned