diff --git a/.dummy b/.dummy
deleted file mode 100644
index 945c9b4..0000000
--- a/.dummy
+++ /dev/null
@@ -1 +0,0 @@
-.
\ No newline at end of file
diff --git a/unsync.py b/unsync.py
new file mode 100755
index 0000000..6c5bd86
--- /dev/null
+++ b/unsync.py
@@ -0,0 +1,132 @@
+#!/bin/python2
+
+# only using python2 because mutagen
+from __future__ import print_function
+
+import os
+import os.path
+import sys
+import mutagen
+import mutagen.id3
+import mutagen.easyid3
+
+def popm_any(id3):
+    for k, v in id3.iteritems():
+        if k.startswith('POPM'):
+            return v
+
+def byte2rating(b):
+    if b >= 224: return 5
+    if b >= 160: return 4
+    if b >= 96: return 3
+    if b >= 32: return 2
+    if b >= 1: return 1
+    return 0
+
+def rating_get(id3, key):
+    try:
+        return list(id3['TXXX:RATING'])
+    except KeyError:
+        try:
+            return list(unicode(byte2rating(popm_any(id3).rating)))
+        except AttributeError:
+            return
+def rating_set(id3, key, val):
+    # TODO: test
+    try:
+        frame = id3["TXXX:RATING"]
+    except KeyError:
+        id3.add(mutagen.id3.TXXX(encoding=3, desc=u'RATING', text=val))
+    else:
+        frame.encoding = 3
+        frame.text = val
+def rating_delete(id3, key):
+    # TODO: delete POPM too?
+    del(id3["TXXX:RATING"])
+
+mutagen.easyid3.EasyID3.RegisterTXXXKey('sync', 'SYNC')
+mutagen.easyid3.EasyID3.RegisterKey('rating', rating_get, rating_set, rating_delete)
+
+def safetydance(d, k):
+    if k in d: return d[k]
+
+def shouldsync(md):
+    rating = -1
+    sync = u''
+    if safetydance(md, 'rating'):
+        try:
+            rating = int(md['rating'][0])
+        except ValueError:
+            pass
+    if safetydance(md, 'sync'):
+        sync = md['sync'][0].lower()
+
+    if sync == u'no' or sync == u'space':
+        return False
+    if sync == u'yes' or sync == u'share':
+        return True
+    if rating >= 3:
+        return True
+    return False
+
+def findmatching(haystack, needle):
+    artist = safetydance(needle, 'artist')
+    album = safetydance(needle, 'album')
+    title = safetydance(needle, 'title')
+    for match in haystack:
+        if artist == safetydance(match, 'artist') \
+          and album == safetydance(match, 'album') \
+          and title == safetydance(match, 'title'):
+            return match
+
+def run(args):
+    if not len(args) in (2, 3):
+        print("I need a path or two!", file=sys.stderr)
+        sys.exit(1)
+
+    inonly = len(args) == 2
+
+    # BUG: doesn't work with my .m4a files?
+    goodexts = ('.mp3', '.m4a', '.flac', '.ogg')
+    tosync = []
+    indir = args[1]
+    walker = os.walk(indir)
+
+    # TODO: abstract to mdloop(callback)
+    for root, _, files in walker:
+        for f in files:
+            ext = os.path.splitext(f)[1].lower()
+            if not ext in goodexts: continue
+            path = os.path.join(root, f)
+            md = mutagen.File(path, easy=True)
+            if shouldsync(md):
+                if inonly: print(path)
+                else: tosync.append(md)
+
+    if inonly: return
+    print("Beginning matching...", file=sys.stderr)
+
+    outdir = args[2]
+    walker = os.walk(outdir)
+    for root, _, files in walker:
+        for f in files:
+            ext = os.path.splitext(f)[1].lower()
+            if not ext in goodexts: continue
+            path = os.path.join(root, f)
+            md = mutagen.File(path, easy=True)
+            match = findmatching(tosync, md)
+            # TODO: don't print anything
+            # TODO: don't match mismatched lengths (Xing?)
+            # TODO: update important tags on mostly matching files
+            # TODO: don't sync files that wouldn't match!
+            # TODO: convert files in loop that works on altered tosync
+            if match:
+                print("MATCHING", path)
+            else:
+                # TODO: just delete missing ones here
+                print("MISSING", path)
+
+try:
+    run(sys.argv)
+except KeyboardInterrupt:
+    sys.exit(1)