Index: cfg.py
==================================================================
--- cfg.py
+++ cfg.py
@@ -5,25 +5,25 @@
 import sys
 import time
 random.seed(time.time())
 
 def main():
-    key = "C"
+    key = "A"
     note_grammars = {
-        "u": ["I V I IV u", "I IV", "I VII IV"  , "e"],
+        "u": ["I V V V I I IV u u", "I IV u u", "I VII IV u u"  , "e"],
         "e": [""],
     }
     chord_grammars = {
-        "u": ["I IV V IV I", "e"],
+        "u": ["I IV V IV I u u", "I VII IV u u", "I V IV u u", "e"],
         "e": [""]
     }
     compose_piece(key, note_grammars)
     compose_piece(key, chord_grammars, chords=True)
 
 def compose_piece(key, grammars, chords=False):
     score = ""
-    while len(score.split()) < 15:
+    while len(score.split()) < 200:
         score = "u u u"
         score = generate_score(score, grammars)
     score = transliterate_score(score, key, chords)
     score = generate_csound_score(score)
     print "f1  0   256 10  1 0 3   ; sine wave function table"

ADDED   parse.py
Index: parse.py
==================================================================
--- parse.py
+++ parse.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python
+
+from ply import lex
+
+tokens = (
+    "NOTE",
+    "REST",
+    "SHARP",
+    "FLAT",
+    "OCTAVE",
+    "NATURAL",
+    "LENGTH",
+)
+
+t_NOTE = r"[A-Ga-g]"
+t_REST = r"z"
+t_SHARP = r"\^"
+t_FLAT = r"_"
+t_NATURAL = r"="
+t_OCTAVE = r"'+|,+"
+
+def t_LENGTH(t):
+    r"/?\d+"
+    multiplier = float(t.value.strip("/"))
+    if t.value.startswith("/"):
+        multiplier = 1/multiplier
+    t.value = multiplier
+    return t
+
+def t_error(t):
+    raise TypeError("Unknown text '%s'" % (t.value,))
+
+t_ignore = " |"
+
+lex.lex()
+
+lex.input("GFG B'AB,, | g/2fg gab | GFG BAB | d2A AFD")
+for tok in iter(lex.token, None):
+    print repr(tok.type), repr(tok.value)

Index: test.sco
==================================================================
--- test.sco
+++ test.sco
@@ -1,62 +0,0 @@
-f1  0   256 10  1 0 3   ; sine wave function table
-i2 0.000000 1 7000 9.00 9.00 0 6
-i2 0.250000 1 7000 8.07 8.07 0 6
-i2 0.500000 1 7000 8.00 8.00 0 6
-i2 0.750000 1 7000 8.05 8.05 0 6
-i2 1.000000 1 7000 9.00 9.00 0 6
-i2 1.250000 1 7000 9.07 9.07 0 6
-i2 1.500000 1 7000 8.00 8.00 0 6
-i2 1.750000 1 7000 8.05 8.05 0 6
-i2 2.000000 1 7000 8.00 8.00 0 6
-i2 2.250000 1 7000 9.11 9.11 0 6
-i2 2.500000 1 7000 8.05 8.05 0 6
-i2 2.750000 1 7000 9.00 9.00 0 6
-i2 3.000000 1 7000 9.07 9.07 0 6
-i2 3.250000 1 7000 9.00 9.00 0 6
-i2 3.500000 1 7000 8.05 8.05 0 6
-f1  0   256 10  1 0 3   ; sine wave function table
-i2 0.000000 1 7000 8.02 8.02 0 6
-i2 0.000000 1 7000 7.07 7.07 0 6
-i2 0.000000 1 7000 8.11 8.11 0 6
-i2 1.000000 1 7000 7.07 7.07 0 6
-i2 1.000000 1 7000 8.00 8.00 0 6
-i2 1.000000 1 7000 7.02 7.02 0 6
-i2 2.000000 1 7000 8.09 8.09 0 6
-i2 2.000000 1 7000 8.00 8.00 0 6
-i2 2.000000 1 7000 8.04 8.04 0 6
-i2 3.000000 1 7000 8.07 8.07 0 6
-i2 3.000000 1 7000 8.00 8.00 0 6
-i2 3.000000 1 7000 8.02 8.02 0 6
-i2 4.000000 1 7000 7.02 7.02 0 6
-i2 4.000000 1 7000 7.07 7.07 0 6
-i2 4.000000 1 7000 7.11 7.11 0 6
-i2 5.000000 1 7000 7.02 7.02 0 6
-i2 5.000000 1 7000 7.07 7.07 0 6
-i2 5.000000 1 7000 8.11 8.11 0 6
-i2 6.000000 1 7000 8.07 8.07 0 6
-i2 6.000000 1 7000 7.00 7.00 0 6
-i2 6.000000 1 7000 7.02 7.02 0 6
-i2 7.000000 1 7000 8.09 8.09 0 6
-i2 7.000000 1 7000 7.00 7.00 0 6
-i2 7.000000 1 7000 7.04 7.04 0 6
-i2 8.000000 1 7000 7.07 7.07 0 6
-i2 8.000000 1 7000 7.00 7.00 0 6
-i2 8.000000 1 7000 7.02 7.02 0 6
-i2 9.000000 1 7000 8.02 8.02 0 6
-i2 9.000000 1 7000 8.07 8.07 0 6
-i2 9.000000 1 7000 7.11 7.11 0 6
-i2 10.000000 1 7000 7.02 7.02 0 6
-i2 10.000000 1 7000 8.07 8.07 0 6
-i2 10.000000 1 7000 8.11 8.11 0 6
-i2 11.000000 1 7000 7.07 7.07 0 6
-i2 11.000000 1 7000 8.00 8.00 0 6
-i2 11.000000 1 7000 7.02 7.02 0 6
-i2 12.000000 1 7000 8.09 8.09 0 6
-i2 12.000000 1 7000 7.00 7.00 0 6
-i2 12.000000 1 7000 8.04 8.04 0 6
-i2 13.000000 1 7000 7.07 7.07 0 6
-i2 13.000000 1 7000 7.00 7.00 0 6
-i2 13.000000 1 7000 8.02 8.02 0 6
-i2 14.000000 1 7000 7.02 7.02 0 6
-i2 14.000000 1 7000 7.07 7.07 0 6
-i2 14.000000 1 7000 7.11 7.11 0 6