I compiled libmad for sox. When I try to read an mp3 I get this message:
sox FAIL util: Unable to load MAD decoder library (libmad) function \"mad_stream_buffer\".<
You can download SoX binaries together with libmad.dll and libmp3lame.dll from http://www.videohelp.com/software/SoX
http://www.videohelp.com/download/sox-14.4.0-libmad-libmp3lame.zip