pascal-triangle

pascal-triangle

      1
     1 1
    1 2 1
   1 3 3 1
  1 4 6 4 1
1 5 10 10 5 1

pascals_triangle_run.py

>>> list(pascals_triangle(5))
>>> [[1], [1, 1], [1, 2, 1], [1, 3, 3, 1], [1, 4, 6, 4, 1]]

play_list.py

def play_list(pitch_list, octave_list, duration,
              volume=120):
    result = NoteSeq()
    for pitch in pitch_list:
        note = pitch % 12
        octave = choice_if_list(octave_list)
        dur = choice_if_list(duration)
        vol = choice_if_list(volume)
        result.append(Note(note, octave, dur, vol))
    return result

random1.py

def random1():
    chromatic = range(0, 12)
    durations = [1/64, 1/32, 1/16, 1/8, 1/4, 1/2, 1]
    notes1 = random_notes(chromatic,
                          range(0, 9),
                          durations,
                          100,
                          range(0, 128, 20))
    gen_midi("random1.mid", notes1)

random2.py

def random2():
    chromatic = range(0, 12)
    notes2 = random_notes(chromatic,
                          range(3, 7),
                          [1/16, 1/8],
                          100)
    gen_midi("random2.mid", notes2)

random3.py

def random3():
    pentatonic = [0, 2, 4, 7, 9]
    notes = random_notes(pentatonic,
                         range(5, 7),
                         1/16,
                         100)
    gen_midi("random3.mid", notes)

random_fib.py

def random_fib():
    octave = range(5, 7)
    fib = fibonacci(100000000000)
    pascal = flatten(pascals_triangle(30))

    n1 = play_list(fib, octave, 1/16)
    n2 = play_list(pascal, 4, 1/16)
    n3 = play_list(pascal, octave, 1/16)

    gen_midi("fibonnacci.mid", n1)
    gen_midi("pascal.mid", n2)
    gen_midi("pascal_octaves.mid", n3)

random_notes.py

def random_notes(pitch_list, octave, duration,
                 number_of_notes, volume=120):
    result = NoteSeq()
    for x in range(0, number_of_notes):
        pitch = choice(pitch_list)
        octave = choice_if_list(octave)
        dur = choice_if_list(duration)
        vol = choice_if_list(volume)
        result.append(Note(pitch, octave, dur, vol))
    return result

random_notes_run.py

>>> random_notes(range(0, 12), range(5, 7), [0.25, 0.5, 1], 5)
<Seq: [<A>, <B>, <C#>, <A#>, <F#>]>

random_notes_run2.py

>>> random_notes([0, 2, 4, 7, 9], 5, 0.5, 5)
<Seq: [<C>, <A>, <D>, <A>, <G>]>