original shntool output: E:\1995\gd95-05-25.shnf>shntool len *.shn length expanded size cdr WAVE probs filename 11:58.31 126727800 -b- -- -xx gd95-05-25d1t01.shn 8:30.54 90091054 --- h- -xx gd95-05-25d1t02.shn 6:38.64 70357774 --- h- -xx gd95-05-25d1t03.shn 8:06.15 85765726 --- h- -xx gd95-05-25d1t04.shn 6:11.49 65559694 --- h- -xx gd95-05-25d1t05.shn 8:21.44 88479934 --- h- -xx gd95-05-25d1t06.shn 7:48.57 82689310 --- h- -xx gd95-05-25d1t07.shn 14:10.20 149988180 -b- -- -xx gd95-05-25d2t01.shn 8:12.46 86897038 --- h- -xx gd95-05-25d2t02.shn 7:14.43 76658782 --- h- -xx gd95-05-25d2t03.shn 12:20.67 130693630 --- h- -xx gd95-05-25d2t04.shn 13:36.71 144109438 --- h- -xx gd95-05-25d2t05.shn 12:25.19 131462734 --- h- -xx gd95-05-25d3t01.shn 5:04.31 53698558 --- h- -xx gd95-05-25d3t02.shn 9:41.57 102622510 --- h- -xx gd95-05-25d3t03.shn 6:30.01 68798398 --- h- -xx gd95-05-25d3t04.shn 2:32.62 26958670 --- h- -xx gd95-05-25d3t05.shn 4:49.03 50985832 -b- -- -xx gd95-05-25d3t06.shn 154:14.59 1632545062 B (totals for 18 files) App\Http\Controllers\Api\FileDownloadController::download(): Return value must be of type string, none returned