C:\> shntool len *.wav
    length     expanded size   cdr  WAVE  probs   filename
     8:47.68      93122780     ---   --    ---    gd78-11-20-d1t01.s1.wav
    14:02.40     148622924     ---   --    ---    gd78-11-20-d1t02.s1.wav
     2:25.35      25660364     ---   --    ---    gd78-11-20-d1t03.s1.wav
     5:06.52      54100748     ---   --    ---    gd78-11-20-d1t04.s1.wav
     7:36.52      80560748     ---   --    ---    gd78-11-20-d1t05.s1.wav
     6:57.28      73624700     ---   --    ---    gd78-11-20-d1t06.s1.wav
     7:05.35      75052364     ---   --    ---    gd78-11-20-d1t07.s1.wav
     0:32.08       5663660     ---   --    ---    gd78-11-20-d2t01.s1.wav
     4:34.12      48361868     ---   --    ---    gd78-11-20-d2t02.s1.wav
     9:15.01      97904396     ---   --    ---    gd78-11-20-d2t03.s1.wav
     7:12.37      76291868     ---   --    ---    gd78-11-20-d2t04.s1.wav
     1:58.65      20968124     ---   --    ---    gd78-11-20-d2t05.s1.wav
     1:30.14      15908972     ---   --    ---    gd78-11-20-d2t06.s2.wav
     8:13.41      87061676     ---   --    ---    gd78-11-20-d2t07.s2.wav
     3:02.00      32104844     ---   --    ---    gd78-11-20-d2t08.s2.wav
     3:19.21      35153036     ---   --    ---    gd78-11-20-d2t09.s2.wav
     4:32.66      48136076     ---   --    ---    gd78-11-20-d2t10.s2.wav
     9:19.46      98715836     ---   --    ---    gd78-11-20-d3t01.s2.wav
    11:05.30     117376604     ---   --    ---    gd78-11-20-d3t02.s2.wav
     7:58.55      84448604     ---   --    ---    gd78-11-20-d3t03.s2.wav
     6:15.47      66260588     ---   --    ---    gd78-11-20-d3t04.s2.wav
     8:41.06      91918556     ---   --    ---    gd78-11-20-d3t05.s2.wav
   139:33.09    1477019336 B                      (totals for 22 files)

C:\>