Someone

#!/usr/bin/python -OO

import os.path
import sys

import mutagen.easyid3
import mutagen.id3
import mutagen.mp4
import mutagen.flac


if len(sys.argv) < 3:
    print 'USAGE: %s [root source dir] [destination dir]' % sys.argv[0]
    raise SystemExit

src, dest = sys.argv[1:]

if not os.path.exists(src):
    print 'ERROR: Source dir %s does not exist.' % src
    raise SystemExit

if not os.path.exists(dest):
    print 'Creating destination dir `%s`.' % dest
    os.makedirs(dest)

def flac(fname):
    info = dict(mutagen.flac.Open(fname))
    info['tracknumber'] = int(info.get('tracknumber', ['0/0'])[0].split('/')[0])
    return info

def mp3(fname):
    info = dict(mutagen.easyid3.Open(fname))
    info['tracknumber'] = int(info.get('tracknumber', ['0/0'])[0].split('/')[0])
    return info

def m4a(fname):
    info = dict(mutagen.mp4.Open(fname))
    info = { 'tracknumber': info.get('trkn', (0,))[0],
                'title': info.get(r'\xa9nam', 'Unknown Title'),
                'artist': info.get(r'\xa9ART', 'Unknown Artist'),
                'album': info.get(r'\xa9alb', 'Unknown Album')
                }
    return info

handlers = {
                    'flac': flac,
                    'mp3': mp3,
                    'm4a': m4a,
                    'm4p': m4a
                    }

for root,dirs,files in os.walk(src):
    for file in files:
        fullpath = os.path.join(root, file)
        ext = file.split('.')[-1]
        try:
            tags = handlers.get(ext, lambda x:'')(fullpath)
            if tags != '':
                val = lambda x,y : tags.get(x, [y])[0].strip()

                artist =  val('artist', 'Unknown Artist')
                album = val('album', 'Unknown Album')
                title = val('title', 'Unknown Track')
                #title() Capitalizes Strings Like This
                artist = artist.title()
                album = album.title()

                dir = os.path.join(dest, artist, album)

                if not os.path.exists(dir):
                    os.makedirs(dir)

                endfile = os.path.join(dir, '%s.%s' % (title.replace('/',''), ext))
                if not os.path.exists(endfile):
                    try:
                        os.popen(u'ln "%s" "%s"' % (fullpath, endfile))
                    except:
                        print fullpath, endfile, ':('

        except mutagen.id3.ID3NoHeaderError, KeyError:
        #error loading tags
           pass