diff --git a/spielspass/normalizer.py b/spielspass/normalizer.py
index 730b9b2..47c7243 100755
--- a/spielspass/normalizer.py
+++ b/spielspass/normalizer.py
@@ -5,24 +5,39 @@
 ## - provides normalized wavefiles using transcode
 ## - burns an audio-cd
 # !!feel free to copy, modify, redistribute and at most _use_ it!!
-# comments to: age-at-systemausfall-dot-org 02004
+# AGE/02004
 
-import os
+import os,sys
 import string
 
-m3ufile = "foo.m3u"
-wavdir = "/mnt/ionos/mugge/aufnahme/ready"
-recorder = "ATAPI:0,0,0" #fuer cdrecord mit 2.6 kernel und ide brenner
+#recorder = "ATAPI:0,0,0" #fuer cdrecord mit 2.6 kernel und ide brenner
+recorder = "0,0,0" #fuer cdrecord mit 2.6 kernel und ide brenner
+
+__doc__ = """usage: %s file.m3u wav-destination""" % sys.argv[0]
+
+################
+### init checks
+try:
+	m3ufile = sys.argv[1]
+	wavdir = sys.argv[2]
+	if not os.access(wavdir,os.W_OK) : 
+		print "%s not writeable" % wavdir
+		sys.exit(3)
+except:
+	print >>sys.stderr, __doc__
+	sys.exit(1)
+
 
 print "\nDirty, lame hack in action:\n"
 ################
-### read m3u 
+### m3u einlesen
 try:
 	temp = open(m3ufile,"r")
 	m3u = temp.read()
 	temp.close()
 except:
 	print "I can't find the .m3u file"
+	sys.exit(2)
 # M's Kommentar Schnibbler
 notfound = 0
 while notfound == 0:
@@ -39,21 +54,35 @@ for i in valuepairs:
 	if i != "":
 		m3u.append(i)
 # im m3u-array stehen jetzt hoffentlich ;) nur noch pfadangaben
-# checken ob's stimmt
+# checken ob's stimmt & und ob alle files existieren
+abort = 0
 for i in m3u:
 	if not os.path.exists(i):
-		print "===> %s not found!" % i
-		print "I'll ignore it."
+		abort = abort + 1
+		print "===> not found: %s " % i
 		m3u.remove(i)
-print "\nI found %i audiofiles to convert, normalize and burn:" % len(m3u)
+if abort > 0:
+	print "\nI can't find %i audiofiles - giving up" % abort
+	#TODO
+	# abfrage ob ohne die files mit gekuertzter m3u weiter gemacht werden
+	# soll..
+	sys.exit(0)
+else:	
+	print "\nI found %i audiofiles to convert, normalize and burn:" % len(m3u)
+
 
 ##############
-### ogg -> wav
+### ogg/mp3 -> wav
 count = 0
 for file in m3u:
 	count+=1
-	#TODO: count braucht fuehrende nullen, damit die reihenfolge auf der cd stimmt!!
-	command = "mplayer  \""+file+"\" -ao pcm -aofile "+wavdir+"/"+str(count)+".wav &> /dev/null"
+	# fuehrende nullen ranballern
+	#if count < 10:
+		#count0 = "0"+str(count)
+	#else:
+		#count0 = str(count)
+	count0 = "%.3i" % count
+	command = "mplayer  \""+file+"\" -vc dummy -vo null -ao pcm -aofile "+wavdir+"/"+str(count0)+".wav &> /dev/null"
 	print "\nexec: "+command
 	session = os.popen(command,"w")
 	session.write("")
@@ -65,7 +94,6 @@ for file in m3u:
 wavefiles = os.listdir(wavdir)
 for wave in wavefiles:
 	command = "transcode -J normalize -y wav -i "+wavdir+"/"+wave+" -m "+wavdir+"/"+ wave+".norm &> /dev/null"
-
 	print "\nexec: "+command
 	session = os.popen(command,"w")
 	session.write("")
@@ -76,9 +104,11 @@ for wave in wavefiles:
 ### wav -> audiocd
 command = "sudo cdrecord -v -dev="+recorder+" -pad -audio "+wavdir+"/*.wav.norm"
 print "\nexec: "+command
+print "\nwarning: If this fails, try to change the \"recorder\" variable!"
 session = os.popen(command,"w")
 session.write("")
 session.flush()
 session.close()
 
-print "\n That's it! Eine Stunde coden und dafuer jetzt den Sommer geniessen..."
+#print "\n That's it! Eine Stunde coden und dafuer jetzt den Sommer geniessen..."
+print "done"