Tiberio@debianhost1502LMi:/media/Tiberio/FiatPunto/libav$ avplay 2Lati2\ -\ Contigo-fdk.m4a
avplay version 11.3-6:11.3-3aacplus1, Copyright (c) 2003-2014 the Libav developers
  built on May 22 2015 14:28:21 with gcc 4.9.2 (Debian 4.9.2-10)
[aac @ 0x7f866c000e00] channel element 1.0 is not allocated
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2Lati2 - Contigo-fdk.m4a':
  Metadata:
    major_brand     : M4A
    minor_version   : 512
    compatible_brands: isomiso2
    title           : Contigo
    artist          : 2Lati2
    encoder         : Lavf56.1.0
    track           : 138
  Duration: 00:04:33.71, start: 0.000000, bitrate: 41 kb/s
    Stream #0.0(und): Audio: aac, 44100 Hz, mono, fltp, 39 kb/s (default)
[aac @ 0x7f866c000e00] channel element 1.0 is not allocated
   1.39 A-V:  0.000 s:0.0 aq=  320KB vq=    0KB sq=    0B f=0/