diff --git a/Demo/sgi/cd/cdaiff.py b/Demo/sgi/cd/cdaiff.py
index b3b9bb0..79a9328 100755
--- a/Demo/sgi/cd/cdaiff.py
+++ b/Demo/sgi/cd/cdaiff.py
@@ -1,44 +1,33 @@
-# Dump CD audio on disk (in AIFF format; stereo, 16 bit samples, 44.1 kHz).
-#
-# Each argument is either a track to play or a quoted 7-tuple:
-#	'(track, min1, sec1, frame1, min2, sec2, frame2)'
-# to play the track from min1:sec1:frame1 to min2:sec2:frame2.
-# If track is zero, times are absolute instead.
-
 import sys
-import string
 import readcd
 import aiff
 import AL
 import CD
 
+Error = 'cdaiff.Error'
+
 def writeaudio(a, type, data):
 	a.writesampsraw(data)
 
-def ptimecallback(a, type, (min, sec, frame)):
-	if frame == 0:
-		print 'T =', min, ':', sec
-
 def main():
-	a = aiff.Aiff().init(sys.argv[1], 'w')
+	if len(sys.argv) > 1:
+		a = aiff.Aiff().init(sys.argv[1], 'w')
+	else:
+		a = aiff.Aiff().init('@', 'w')
 	a.sampwidth = AL.SAMPLE_16
 	a.nchannels = AL.STEREO
 	a.samprate = AL.RATE_44100
 	r = readcd.Readcd().init()
-	l = []
 	for arg in sys.argv[2:]:
 		x = eval(arg)
 		try:
-			l = len(x)
+			if len(x) <> 2:
+				raise Error, 'bad argument'
 			r.appendstretch(x[0], x[1])
 		except TypeError:
 			r.appendtrack(x)
 	r.setcallback(CD.AUDIO, writeaudio, a)
-	r.setcallback(CD.PTIME, ptimecallback, None)
-	try:
-		r.play()
-	except KeyboardInterrupt:
-		pass
+	r.play()
 	a.destroy()
 
 main()