How to convert audio file from .WMA format to .MP3 format?

If you have FFmpeg installed, you can use the "ffmpeg" command to convert an audio file from .WMA format to .MP3 format: "ffmpeg -i test.wma -map 0:0 test.mp3". Here is an example of how to use the "ffmpeg" command:

\fyicener>ffmpeg -i test.wma -map 0:0 test.mp3

ffmpeg version N-63378-g1d36def Copyright (c) 2000-2014 the FFmpeg 
  developers built on May 22 2014 22:01:44 with gcc 4.8.2 (GCC)
...
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, asf, from 'test.wma':
  Metadata:
    WM/Track        : 0
    WM/MediaPrimaryClassID: {D1607DBC-E323-4BE2-86A1-48A42A28441E}
    WMFSDKVersion   : 9.00.00.4504
    WMFSDKNeeded    : 0.0.0.0000
    album_artist    : 
    track           : 1
    WM/EncodingTime : 18446744072505568256
    IsVBR           : 0
    DeviceConformanceTemplate: L1
    WM/WMADRCPeakReference: 31293
    WM/WMADRCAverageReference: 8442
  Duration: 00:04:56.04, start: 0.000000, bitrate: 128 kb/s
    Stream #0:0(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, 
       stereo, fltp, 128 kb/s
Output #0, mp3, to 'test.mp3':
  Metadata:
    WM/Track        : 0
    WM/MediaPrimaryClassID: {D1607DBC-E323-4BE2-86A1-48A42A28441E}
    WMFSDKVersion   : 9.00.00.4504
    WMFSDKNeeded    : 0.0.0.0000
    TPE2            : 
    TRCK            : 1
    WM/EncodingTime : 18446744072505568256
    IsVBR           : 0
    DeviceConformanceTemplate: L1
    WM/WMADRCPeakReference: 31293
    WM/WMADRCAverageReference: 8442
    TSSE            : Lavf55.40.100
    Stream #0:0(eng): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp
    Metadata:
      encoder         : Lavc55.63.100 libmp3lame
Stream mapping:
  Stream #0:0 -> #0:0 (wmav2 -> libmp3lame)
Press [q] to stop, [?] for help
[libmp3lame @ 03a95620] Queue input is backward in time
[mp3 @ 03a8fb40] Application provided invalid, non monotonically 
   increasing dts to muxer in stream 0: 33010 >= 31084
size=    4628kB time=00:04:56.07 bitrate= 128.0kbits/s
video:0kB audio:4627kB subtitle:0kB other streams:0kB global headers:0kB muxing
overhead: 0.013169%