Add files by Jack
diff --git a/Mac/Demo/speech/hum.py b/Mac/Demo/speech/hum.py
new file mode 100644
index 0000000..ac05471
--- /dev/null
+++ b/Mac/Demo/speech/hum.py
@@ -0,0 +1,31 @@
+#
+# Hum - The singing macintosh
+#
+import macspeech
+import sys
+import string
+
+dict = { 'A':57, 'A#':58, 'B':59, 'C':60, 'C#':61, 'D':62, 'D#':63,
+		 'E':64, 'F':65, 'F#':66, 'G':67, 'G#':68}
+
+vd = macspeech.GetIndVoice(2)
+vc = vd.NewChannel()
+print 'Input strings of notes, as in A B C C# D'
+while 1:
+	print 'S(tr)ing-',
+	str = sys.stdin.readline()
+	if not str:
+		break
+	str = string.split(str[:-1])
+	data = []
+	for s in str:
+		if not dict.has_key(s):
+			print 'No such note:', s
+		else:
+			data.append(dict[s])
+	print data
+	for d in data:
+		vc.SetPitch(float(d))
+		vc.SpeakText('la')
+		while macspeech.Busy():
+			pass