Generating Music With SageMath And Sonic Pi - Examples - 2

Source

1 Blues Loop

An approximate translation of the Blues Loop illustrated at mathematica.SE. (Listen to the Blues Loop)

Sync the OSC URL in Sonic Pi

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live_loop :foo do
  use_synth :piano
  use_real_time
  p1, p2, p3, t1, t2 = sync "/osc/trigger/play"
  play :C, pitch: p1, attack: t1, attack_level: 0, sustain: t2-t1, release: t2-t1
  play :C, pitch: p2, attack: t1, attack_level: 0, sustain: t2-t1, release: t2-t1
  play :C, pitch: p3, attack: t1, attack_level: 0, sustain: t2-t1, release: t2-t1
end

And send the notes from Sage

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%python
import numpy as np
import OSC
from time import sleep

addr = ('localhost', 4559)
cl = OSC.OSCClient()
cl.connect(addr)

def send_message(url, *args):
    msg = OSC.OSCMessage()
    msg.setAddress(url)
    for l in args:
        msg.append(l)
    cl.send(msg)

c = 1.25
v = np.array([0, 0.4], dtype=float)
b = 0.25
lst = [[-12, -5, 0], [-8, -3, 4], [-5, -13, 2], [-3, 0, -8], [-2, -12, -8], [-3, 0, -8], [-5, -1, 2], [-8, -3, -20]]
li = np.array(lst, dtype=int)

def bld(l1, rep):
    for r in range(rep):
        for l in l1:
            for p in v/c:
                dur = np.array([p, p+b], dtype=float)/c
                send_message("/trigger/play", l, dur)
                sleep(dur[1])

li2 = [[li, 1], [li + 5, 1], [li, 2], [li + 5, 2], [li, 2], [li + 7, 1], [li + 5, 1], [li, 1], [li + 7, 1]]

for l in li2:
    bld(l[0], l[1])

2 Morse Code

Let's make a dynamic worksheet to generate morse code beeps. Only alpha-numeric symbols are used here, and timings are taken from a Sonic Pi example

In Sonic Pi,

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live_loop :foo do
  use_synth :saw
  use_real_time
  t1, t2 = sync "/osc/trigger/morse"
  cue t1, t2
  play :C6, sustain: t1*0.9, release: t2*0.1
  sleep t1
end

and in SageMath,

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%python
import numpy as np
import OSC
from time import sleep

addr = ('localhost', 4559)
cl = OSC.OSCClient()
cl.connect(addr)

def send_message(url, *args):
    msg = OSC.OSCMessage()
    msg.setAddress(url)
    for l in args:
        msg.append(l)
    cl.send(msg)

codes = {
    'A': '.-',     'B': '-...',   'C': '-.-.',
    'D': '-..',    'E': '.',      'F': '..-.',
    'G': '--.',    'H': '....',   'I': '..',
    'J': '.---',   'K': '-.-',    'L': '.-..',
    'M': '--',     'N': '-.',     'O': '---',
    'P': '.--.',   'Q': '--.-',   'R': '.-.',
    'S': '...',    'T': '-',      'U': '..-',
    'V': '...-',   'W': '.--',    'X': '-..-',
    'Y': '-.--',   'Z': '--..',   '0': '-----',
    '1': '.----',  '2': '..---',  '3': '...--',
    '4': '....-',  '5': '.....',  '6': '-....',
    '7': '--...',  '8': '---..',  '9': '----.'
}

speed = 0.08
code_timing = {'.': 1*speed, '-': 3*speed}
element_gap = 1*speed
char_gap = 3*speed
word_gap = 7*speed - char_gap

def to_morse_code(s):
    spl = s.split(' ')
    for l in spl:
        if l == '': continue # if multiple spaces are input
        mc = ' '.join(codes.get(i.upper()) for i in l)
        print l + ": " + mc

    for c in s:
        if c == ' ':
            sleep(word_gap)
            continue
        mc = codes.get(c.upper())
        for i in mc:
            send_message("/trigger/morse", code_timing[i], code_timing[i])
            sleep(element_gap + code_timing[i])
        sleep(char_gap + element_gap)


@interact
def _( msg=input_box(label='Enter Message', type=str, default='Hi'), auto_update=True):
    to_morse_code(msg)