turning in algorithmic music toolbox

blues_solo.py

@@ -31,6 +31,32 @@ def add_note(out, instr, key_num, duration, bpm, volume):
 blues_scale = [25, 28, 30, 31, 32, 35, 37, 40, 42, 43, 44, 47, 49, 52, 54, 55, 56, 59, 61]
 beats_per_minute = 45				# Let's make a slow blues solo
 
-add_note(solo, bass, blues_scale[0], 1.0, beats_per_minute, 1.0)
-
-solo >> "blues_solo.wav"
+curr_note = 0
+add_note(solo, bass, blues_scale[curr_note], 1.0, beats_per_minute, 1.0)
+
+licks = [ [ [1, 0.5*1.1], [1, 0.5*0.9], [1, 0.5*1.1], [1, 0.5*0.9] ], [ [-1, 0.5*1.1], [-1, 0.5*0.9], [-1, 0.5*1.1], [-1, 0.5*0.9] ] ]
+for i in range(16):
+    lick = choice(licks)    ##chose a random lick
+    end = False             ##end to prevent notes playing repeatedly
+    for i, note in enumerate(lick):
+        if not end:
+            curr_note += note[0]
+            if curr_note < 0 or curr_note > len(blues_scale) - 1:           ##if it reaches the end or bottom,
+                curr_note -= note[0]
+                end = True                                                  ##end is true,
+                add_note(solo, bass, blues_scale[curr_note], (4-i)*0.5, beats_per_minute, 1.0)  ##play the note scaled by its position
+            else:
+                add_note(solo, bass, blues_scale[curr_note], note[1], beats_per_minute, 1.0)     ##or play the note otherwise
+
+backing_track = AudioStream(sampling_rate, 1)
+Wavefile.read('backing.wav', backing_track)
+
+m = Mixer()
+
+solo *= 0.4             # adjust relative volumes to taste
+backing_track *= 2.0
+
+m.add(2.25, 0, solo)    # delay the solo to match up with backing track    
+m.add(0, 0, backing_track)
+
+m.getStream(500.0) >> "slow_blues.wav"      ##save as slow_blues.wav