Toolbox submission

blues_solo.py

@@ -19,18 +19,64 @@ def add_note(out, instr, key_num, duration, bpm, volume):
     stream *= volume
     out << stream
 
+def note_adjust(note, scale):
+    """shifts a note till it is within an ordered scale of notes"""
+    if 0 <= note <= len(scale)-1:
+        return note
+    elif note < 0:
+        return note_adjust(note + 1, scale)
+    else: # note > len(scale) - 1
+        return note_adjust(note - 1, scale)
+
 # this controls the sample rate for the sound file you will generate
 sampling_rate = 44100.0
 Wavefile.setDefaults(sampling_rate, 16)
 
-bass = GuitarBass(sampling_rate)	# use a guitar bass as the instrument
+#bass = GuitarBass(sampling_rate)
+flute = FluteSlide(sampling_rate)
 solo = AudioStream(sampling_rate, 1)
 
 """ these are the piano key numbers for a 3 octave blues scale in A
 	See: http://en.wikipedia.org/wiki/Blues_scale """
 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
+
+licks = [
+[ [-1,0.5*1.1], [-1,0.5*0.9], [-1, 0.5*1.1], [-1, 0.5*0.9] ],
+
+[ [1,0.25*1.1],[1,0.25*0.9],[1, 0.25*1.1],[1, 0.25*0.9],
+[-1,0.25*1.1],[-1,0.25*0.9],[-1, 0.25*1.1], [-1, 0.25*0.9],
+[1,0.25*1.1],[1,0.25*0.9], [1, 0.25*1.1], [1, 0.25*0.9],
+[1,0.25*1.1], [1,0.25*0.9], [1, 0.25*1.1], [1, 0.25*0.9] ],
+
+[ [1,0.5*1], [1,0.5*0.9], [1, 0.5*1], [1, 0.5*0.9] ],
+
+[ [2,1], [-1, 0.5*1], [-1, 0.5*0.9] ],
+
+[ [1,0.25*1.1],[1,0.25*0.9],[-1, 0.25*1.1],[-1, 0.25*0.9],
+[1,0.333],[1,0.333],[1, 0.333],
+[1,0.25*1.1],[1,0.25*0.9], [1, 0.25*1.1], [1, 0.25*0.9],
+[-1,0.333],[-1,0.333],[-1, 0.333] ]
+
+]
+for i in range(8):
+    lick = choice(licks)
+    for note in lick:
+        curr_note += note[0]
+        curr_note = note_adjust(curr_note, blues_scale)
+        add_note(solo, flute, blues_scale[curr_note], note[1], beats_per_minute, 1.0)
+
+backing_track = AudioStream(sampling_rate, 1)
+Wavefile.read('backing.wav', backing_track)
+
+m = Mixer()
+
+solo *= 0.8             # adjust relative volumes to taste
+backing_track *= 1.6
+
+m.add(2.25, 0, solo)    # delay the solo to match up with backing track
+m.add(0, 0, backing_track)
 
-solo >> "blues_solo.wav"
+m.getStream(500.0) >> "slow_blues.wav"