mp3_tag_iconv

A command-line tool that lets you convert the character encoding of ID3 tags in MP3 files. It also lets you do conversions between Traditional Chinese (big5 or unicode) and Simplified Chinese (gb or unicode).

You'll need the following perl packages:

• Encode::HanExtra
• MP3::Tag
• Encode::CNMap

Usage:

mp3_tag_iconv [-f <from encoding>] [-t <to encoding>] [-n] [-d] [-v] <file> ...
  Options: f - original encoding (default: Guess)
           t - target encoding (default: utf-8, specify utf-8-zhcn or utf-8-zhtw 
for conversion to Simplified or Traditional Chinese)
           n - dry run
           d - specified files are treated as directories (convert *.mp3 in directory)
           v - verbose