一个2B小玩意……缅怀当年高中电脑课上用QBasic的Play函数调用扬声器发声的2B时光。

toy_midi.py

#!/usr/bin/env python
#coding=utf-8

# WINDOWS ONLY #

import winsound
import time

freq_map = {
    "C<"    : 262,
    "C<#"   : 277,
    "D<"    : 294,
    "D<#"   : 311,
    "E<"    : 330,
    "F<"    : 349,
    "F<#"   : 370,
    "G<"    : 392,
    "G<#"   : 415,
    "A<"    : 440,
    "A<#"   : 466,
    "B<"    : 494,

    "C"    : 523,
    "C#"   : 554,
    "D"    : 587,
    "D#"   : 622,
    "E"    : 659,
    "F"    : 698,
    "F#"   : 740,
    "G"    : 784,
    "G#"   : 831,
    "A"    : 880,
    "A#"   : 932,
    "B"    : 988,

    "C>"    : 1046,
    "C>#"   : 1109,
    "D>"    : 1175,
    "D>#"   : 1245,
    "E>"    : 1318,
    "F>"    : 1397,
    "F>#"   : 1480,
    "G>"    : 1568,
    "G>#"   : 1661,
    "A>"    : 1760,
    "A>#"   : 1865,
    "B>"    : 1976,
}

simple_map = 'CDEFGAB'

def PlayNote(beat, duration=400):
    if isinstance(beat, float):
        beat = str(int(beat)) + '#'
    beat = str(beat)
    note = beat.rstrip('+-').upper()
    trail = beat[len(note):]
    if trail:
        ratio = 4 * (1 - 0.5 ** len(trail))
        if '-' in trail:
            duration /= ratio 
        else:
            duration *= ratio
    if note:
        if note[0].isdigit():
            note = simple_map[int(note[0])-1] + note[1:]
        winsound.Beep(freq_map[note], int(duration))
    else:
        time.sleep(duration / 1000.0)

def PlaySong(song, base_duration=400):
    for note in song:
        PlayNote(note, base_duration)

test = [
    '1<', '2<', '3<', '4<', '5<', '6<', '7<', '1', '',
    '1', '2', '3', '4', '5', '6', '7', '1>', '',
    '1>', '2>', '3>', '4>', '5>', '6>', '7>'
]
#PlaySong(test)

happy_birthday = [
    1, '1-', '2+', '1+', '4+', '3++', '-',
    1, '1-', '2+', '1+', '5+', '4++', '-',
    1, '1-', '1>+', '6+', '4+', '3+', '2++', '-',
    '6#', '6#-', '6+', '4+', '5+', '4++++'
]
#PlaySong(happy_birthday, 300)

little_star = [
    1, 1, 5, 5, 6, 6, '5+',
    4, 4, 3, 3, 2, 2, '1+', '',
    5, 5, '4+', 3, 3, '2+', 
    5, 5, 4, 4, 3, 3, '2+', '',
    1, 1, 5, 5, 6, 6, '5+',
    4, 4, 3, 3, 2, 2, '1+'
]
#PlaySong(little_star, 200)

tommorow_will_be_better = [
    3,4,'5+','5+',5,'5+',5,6,'5-','4+', '-',
    3,4,'5+','5+',3,2,'1+','2+','-',
    3,2,1,'1+','1-','1>+','1>+','7+','1>','7+','5+','-',
    6,5,4,'4+',5,6,5,'5+','',
    '1>+', '1>+','--', 6, 3, '6+', 5, '5+', ''
    '6+', '6+', '--', 5, '1+', 2, '3+', '-',
    2, '1+', '1+', 1, '3+', 3, '3+', '2+', '',
    '6+', '5+', 3, 2, '6<-', 3, '2-', '1++', '',
    6, '6+', 7, '1>+', '6+', 7, '7+', '1>', '2>+', '7+',
    '1>', 7, 6, '5+', 5, 1, 2, '3+', '',
    '3+', 7, '7+', '3+', '2>+', '2>+', '1>', '7+', '6++', '-', 
    6, '6+', 7, '1>+', '6+', 7, '7+', '1>', '2>+', '7+',
    '3>++', '2>', '1>-', '1>+', '--',
    '1>', 7, '6+', '6+', 6, '6+', '---', '5+', '5+', 2, '3+', 2, '1++'
]
#PlaySong(tommorow_will_be_better, 180)

Jay_simple_love = [
    '5<',1,2,3,2,3,4,'5+','5-',5,4,'3++','2+','',
    1,1,'2',3,2,3,4,'5+','5-',5,6,'5++','3+','',
    '1+',1,'6<',2,'2-','3',3,'',
    '1+',5,1,'5<','1-','7<',1,'',
    1,'6<',2,'2-',3,3,'4+','4-',4,3,2,1,'1+'
]
#PlaySong(Jay_simple_love, 200)

Stefanie_what_I_cherish = [
    1,2,2,'1+',1,'5+','3+','2+','3+',
    1,2,2,'1+',1,'5+','3+','2+','1+',
]
#PlaySong(Stefanie_what_I_cherish, 200)

Chrismas = [
    '5<--','5<--','5<',3,2,1,'5<+',
    '5<--','5<--','5<',3,2,1,'6<+',
    '6<--','6<--','6<',4,3,2,'7<+', '-',
    5,5,4,2,'3+',
    '5<--','5<--','5<',3,2,1,'5<+',
    '5<--','5<--','5<',3,2,1,'6<+',
    '6<--','6<--','6<',4,3,2,5,'5-','5','5-',6,5,4,2,'1++',
    3,3,'3+',3,3,'3+',
    3,'5-',1,2,'3+','-',
    4,'4-',4,'4-',4,3,'3+',
    '3--','3--',3,2,2,3,'2+',5,'-',
    3,3,'3+',3,3,'3+',
    3,'5-',1,2,'3+','-',
    4,'4-',4,'4-',4,3,'3+',
    '3--','3--',5,5,4,2,1
]
#PlaySong(Chrismas, 300)

Because_of_love = [
    '5<','6<','1-',1,'6<',1,2,3,'2++',
    1,'6<',3,2,'6<',3,'2+','1+','6<++',
    '6<','7<',1,1,'6<','3+','2+',
    1,'6<+',1,3,'5+','2++',
    '2+','3+',5,'3++',5,5,3,2,5,'5++',
    6,7,'1>-','1>','1>-','1>','1>-','7-',5,'3+',
    5,3,5,'6++',5,6,'5-',5,'1++',
    '6<',1,3,2,'6<',3,2,'6<','3+','2++',
    '3+',2,'3+','1+++'
]
PlaySong(Because_of_love, 300)