Challenge: guess the song by just reading the code (before playing it)

play_song.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import subprocess
import time

VERBOSE = False


def wait(seconds):
    time.sleep(seconds)


def play_note(note='C', duration=1, delay=0, vol=1):
    # requires sox to be installed: http://sox.sf.net
    command = (
        "play -qn synth {duration} pluck {note}"
        " fade l 0 {duration} 2 reverb vol {vol}"
    ).format(note=note, duration=duration, vol=vol)

    if VERBOSE:
        print(command)

    subprocess.Popen(command.split())

    if delay:
        wait(delay)


def play_chord(notes, duration=4, delay=0, vol=1):
    for note in notes:
        play_note(note, duration, delay=0.01, vol=vol)

    if delay:
        wait(delay)


def play_song():
    for a in range(2):
        play_note('C2', duration=5)
        for b in range(4):
            play_chord(['E3', 'G3', 'C4'], delay=0.4)
            play_note('C3', delay=0.4)

        play_note('F2', duration=5)
        for b in range(3):
            play_chord(['F3', 'A3', 'C4'], delay=0.4)
            play_note('C3', delay=0.4)

        play_chord(['F3', 'A3', 'C4'], delay=0.2)
        play_note('A#3', duration=0.5, delay=0.2)
        play_note('B3', duration=0.5)
        play_note('C3', delay=0.4)

    for a in range(4):
        play_note('C2', duration=4)
        for b in range(3):
            play_chord(['E3', 'G3', 'C4'], delay=0.4)
            play_note('C3', delay=0.4)

        play_chord(['E3', 'G3', 'B3'], delay=0.4)
        play_note('C3', delay=0.4)

        play_note('F2', duration=4)
        for b in range(3):
            play_chord(['F3', 'A3', 'C4'], delay=0.4)
            play_note('C3', delay=0.4)

        if a % 2 == 0:
            play_chord(['F3', 'A3', 'C4'], delay=0.2)
            play_note('A#3', duration=0.5, delay=0.2)
            play_note('B3', duration=0.5)
            play_note('C3', delay=0.4)
        else:
            play_chord(['F3', 'A3', 'C4'], delay=0.4)
            if a == 3:
                play_note('C2', duration=0.5)
            play_note('C3', delay=0.4)

    play_note('F2', duration=3)
    play_chord(['F3', 'A3', 'C4'], delay=0.4)
    play_note('C3', delay=0.4)
    play_chord(['F3', 'A3', 'C4'], delay=0.4)
    play_note('F2', duration=0.5)
    play_note('C3', delay=0.4)

    play_note('E2', duration=3)
    play_chord(['E3', 'A3', 'C4'], delay=0.4)
    play_note('C3', delay=0.4)
    play_chord(['E3', 'A3', 'C4', 'E4'], delay=0.4)
    play_note('E2', duration=0.5)
    play_chord(['C3', 'E4'], delay=0.4)

    play_note('D4', duration=3)
    play_note('D2', duration=3)
    play_chord(['F3', 'A3', 'C4'], delay=0.4)
    play_note('D3', delay=0.4)
    play_chord(['F3', 'A3', 'C4'], delay=0.4)
    play_note('D2', duration=0.5)
    play_note('D3', delay=0.4)

    play_note('C2', duration=3)
    play_chord(['F3', 'A3', 'C4'], delay=0.4)
    play_note('D3', delay=0.4)
    play_chord(['F3', 'A3', 'C4'], delay=0.4)
    play_note('D3', delay=0.4)

    play_note('G1', duration=4)
    play_chord(['D3', 'F3', 'G3', 'B3'], delay=0.4)
    play_chord(['D3', 'F3', 'G3', 'B3'], delay=0.4)

    wait(0.8)
    play_chord(['D3', 'F3', 'G3', 'B3'], delay=0.8)
    play_note('C4', duration=1, delay=0.4)

    play_note('D4', duration=4, delay=0.4)
    play_chord(['G2', 'D3', 'F3', 'G3', 'B3'], delay=1.6, duration=4, vol=0.5)
    play_note('E4', delay=0.4)
    play_note('G4', delay=0.4)
    play_note('E4', delay=0.2)
    play_note('D4', delay=0.2)
    play_note('C4', delay=0.4)

    for i in range(3):
        play_note('F2', duration=3)
        play_chord(['C3', 'F3'], delay=0.4)
        play_note('C3', delay=0.4)
        play_chord(['F3', 'A3'], delay=0.4)
        play_chord(['C3', 'C4'], duration=0.5, delay=0.4)

        play_note('G2', duration=3)
        play_chord(['D3', 'G3', 'B3'], delay=0.4)
        play_note('D3', delay=0.4)

        if i == 1:
            play_chord(['D3', 'G3', 'A3'], delay=0.2)
            play_note('B3', delay=0.2)
            play_note('G3', delay=0.4)
        else:
            play_chord(['D3', 'G3', 'A3'], delay=0.4)
            play_note('B3', delay=0.2)
            play_note('C4', delay=0.2)

        play_note('C2', duration=3)
        for b in range(2):
            play_chord(['E3', 'G3', 'C4'], delay=0.4)
            play_note('C3', duration=0.5, delay=0.4)

        play_note('E2', duration=3)
        for b in range(2):
            play_chord(['D3', 'G#3', 'B3'], delay=0.4)
            play_note('D3', duration=0.5, delay=0.4)

    play_note('F2', duration=3)
    play_chord(['C3', 'F3'], delay=0.4)
    play_note('C3', delay=0.4)
    play_chord(['F3', 'A3'], delay=0.4)
    play_chord(['C3', 'C4'], delay=0.4)

    play_note('G2', duration=3)
    play_chord(['F3', 'A3', 'D4'], delay=0.8)
    play_note('C4', delay=0.4)
    play_note('D4', delay=0.4)
    play_note('C2', duration=8)
    play_chord(['E3', 'G3', 'E4'], delay=0.2, duration=6)
    play_note('C4', delay=0.2)
    play_note('C4', duration=7)


if __name__ == '__main__':
    import argparse
    parser = argparse.ArgumentParser()
    parser.add_argument('--verbose', action='store_true',
                        help='Enable verbose mode')
    parser.add_argument('--test', action='store_true', help='Run test')
    args = parser.parse_args()

    if args.verbose:
        VERBOSE = True

    play_song()

No Ubuntu:

sudo apt-get install sox