Turning in Toolbox Music Composition

blues_solo.py

@@ -2,7 +2,7 @@
 
 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 +31,36 @@ 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)
+# add_note(solo, bass, blues_scale[0], 1.0, beats_per_minute, 1.0)
 
-solo >> "blues_solo.wav"
+# solo >> "blues_solo.wav"
+
+curr_note = 0
+
+volume = 1.0
+volume_factor = [.9, 1.7]
+add_note(solo, bass, blues_scale[curr_note], 1.0, beats_per_minute, volume)
+
+licks = [ [ [1,0.5*1.1], [-1,0.5], [-1, 0.5*1.1], [2, 0.5], [1,0.5*.9], [-2, .5*.9], [2,.5],[3,1],[-2, .5] ] ]
+for i in range(4):
+    lick = random.choice(licks)
+    for note in lick:
+        curr_note += note[0]
+        if curr_note < 0:
+            curr_note = 0
+        if curr_note > len(blues_scale) - 1:
+            curr_note = len(blues_scale) - 1
+        add_note(solo, bass, blues_scale[curr_note], note[1], beats_per_minute, volume * random.choice(volume_factor))
+
+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"