Turning in ToolBox Music

blues_solo.py

@@ -3,6 +3,7 @@
 from Nsound import *
 import numpy as np
 from random import choice
+import random
 
 def add_note(out, instr, key_num, duration, bpm, volume):
     """ Adds a note from the given instrument to the specified stream
@@ -31,6 +32,33 @@ 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)
+curr_note = 0
+add_note(solo, bass, blues_scale[curr_note], 1.0, beats_per_minute, 1.0)
 
-solo >> "blues_solo.wav"
+licks = [ [ [1,0.5], [1,0.6], [1, 0.3], [-1, 0.6] ], 
+          [ [-1, 0.7], [-1, 0.5], [-1, 0.2], [1, 0.6] ],
+          [ [1, 0.5*1.1], [1, 0.5*0.9], [-1, 0.5*1.1], [1, 0.5*0.9] ],
+          [ [2, 0.5*1.5], [-1, 0.5*0.6], [1, 0.5*0.8], [0, 0.5*1.1] ],
+          [ [2, 0.5*1.5], [-2, 0.5*0.6], [-1, 0.5*0.8], [0, 0.5*1.1] ]
+        ]
+for i in range(7):
+    volume = random.choice([0.8,1,1.2])
+    n = random.choice([0,1,2,3,4])
+    lick = licks[n]
+    for note in lick:
+        curr_note += note[0]
+        if curr_note in range(0,len(blues_scale)):
+	        add_note(solo, bass, blues_scale[curr_note], note[1], beats_per_minute, volume)
+
+backing_track = AudioStream(sampling_rate, 1)
+Wavefile.read('backing.wav', backing_track)
+
+m = Mixer()
+
+solo *= 0.5             # 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"