这个代码似乎运行正常，但除了打开pygame窗口之外，它实际上并没有做任何应该做的事情。我正在寻找按下'z'键时播放的声音。
任何人都可以看到此代码的问题？
import pygame
from pygame.locals import *
import math
import numpy
size = (1200, 720)
screen = pygame.display.set_mode(size, pygame.HWSURFACE | pygame.DOUBLEBUF)
pygame.display.set_caption('Nibbles!')
SAMPLE_RATE = 22050 ## This many array entries == 1 second of sound.
def SineWave(freq=1000,volume=16000,length=1):
num_steps = length*SAMPLE_RATE
s = []
for n in range(num_steps):
value = int(math.sin(n * freq * (6.28318/SAMPLE_RATE) * length)*volume)
s.append( [value,value] )
x_arr = array(s)
return x_arr
def SquareWave(freq=1000,volume=100000,length=1):
length_of_plateau = SAMPLE_RATE / (2*freq)
s = []
counter = 0
state = 1
for n in range(length*SAMPLE_RATE):
if state == 1:
value = volume
else:
value = -volume
s.append( [value,value] )
counter += 1
if counter == length_of_plateau:
counter = 0
if state == 1:
state = -1
else:
state = 1
x_arr = array(s)
return x_arr
def MakeSound(arr):
return pygame.sndarray.make_sound(arr)
def PlaySquareWave(freq=1000):
MakeSound(SquareWave(freq)).play()
def PlaySineWave(freq=1000):
MakeSound(SineWave(freq)).play()
def StopSineWave(freq=1000):
MakeSound(SineWave(freq)).fadeout(350)
def StopSquareWave(freq=1000):
MakeSound(SquareWave(freq)).fadeout(350)
_running = True
while _running:
SineWaveType = 'Sine'
SquareWaveType = 'Square'
d = {SineWaveType:SquareWaveType, SquareWaveType:SineWaveType}
Type = SineWaveType
for event in pygame.event.get():
if event.type == pygame.QUIT:
_running = False
if Type == 'Sine':
if event.type == KEYDOWN:
#lower notes DOWN
if event.key == K_ESCAPE:
_running = False
if event.key == K_ENTER:
Type = d[Type] #Toggle
elif event.key == K_z:
PlaySineWave(130.81)
if event.type == KEYUP:
#lower notes UP
if event.key == K_z:
StopSineWave(130.81).fadeout(350) #fade sound by .35 seconds
elif Type == 'Square':
if event.type == KEYDOWN:
#lower notes DOWN
if event.key == K_z:
PlaySquareWave(130.81)
if event.type == KEYUP:
#lower notes UP
if event.key == K_z:
StopSquareWave(130.81).fadeout(350) #fade sound by .35 seconds
pygame.quit()
编辑（2019.03.06）：现在代码适用于Python 3 - 感谢评论中的Tomasz Gandor建议。
一些修改：
curren_played来保持现有的声音。ESCAPE和ENTER不必检查声音类型。pygame.init()初始化屏幕，混音器和其他东西。c键 - 这样你就可以同时播放两种声音SINE_WAVE_TYPE。您可以在mainloop之前创建波浪并将其保存在current_played中，并在按current_played时在RETURN中生成新的波浪。
import pygame
from pygame.locals import *
import math
import numpy
#----------------------------------------------------------------------
# functions
#----------------------------------------------------------------------
def SineWave(freq=1000, volume=16000, length=1):
num_steps = length * SAMPLE_RATE
s = []
for n in range(num_steps):
value = int(math.sin(n * freq * (6.28318/SAMPLE_RATE) * length) * volume)
s.append( [value, value] )
return numpy.array(s, dtype=numpy.int32) # added dtype=numpy.int32 for Python3
def SquareWave(freq=1000, volume=100000, length=1):
num_steps = length * SAMPLE_RATE
s = []
length_of_plateau = SAMPLE_RATE / (2*freq)
counter = 0
state = 1
for n in range(num_steps):
value = state * volume
s.append( [value, value] )
counter += 1
if counter == length_of_plateau:
counter = 0
state *= -1
return numpy.array(s, dtype=numpy.int32) # added dtype=numpy.int32 for Python3
def MakeSound(arr):
return pygame.sndarray.make_sound(arr)
def MakeSquareWave(freq=1000):
return MakeSound(SquareWave(freq))
def MakeSineWave(freq=1000):
return MakeSound(SineWave(freq))
#----------------------------------------------------------------------
# main program
#----------------------------------------------------------------------
pygame.init()
size = (1200, 720)
screen = pygame.display.set_mode(size, pygame.HWSURFACE | pygame.DOUBLEBUF)
pygame.display.set_caption('Nibbles!')
SAMPLE_RATE = 22050 ## This many array entries == 1 second of sound.
SINE_WAVE_TYPE = 'Sine'
SQUARE_WAVE_TYPE = 'Square'
sound_types = {SINE_WAVE_TYPE:SQUARE_WAVE_TYPE, SQUARE_WAVE_TYPE:SINE_WAVE_TYPE}
current_type = SINE_WAVE_TYPE
current_played = { 'z': None, 'c': None }
_running = True
while _running:
for event in pygame.event.get():
if event.type == pygame.QUIT:
_running = False
# some keys don't depend on `current_type`
elif event.type == KEYDOWN:
if event.key == K_ESCAPE:
_running = False
if event.key == K_RETURN:
current_type = sound_types[current_type] #Toggle
print('new type:', current_type) # added () for Python3
# some keys depend on `current_type`
if current_type == SINE_WAVE_TYPE:
if event.type == KEYDOWN:
#lower notes DOWN
if event.key == K_z:
print(current_type, 130.81) # added () for Python3
current_played['z'] = MakeSineWave(130.81)
current_played['z'].play()
elif event.key == K_c:
print(current_type, 180.81) # added () for Python3
current_played['c'] = MakeSineWave(180.81)
current_played['c'].play()
elif event.type == KEYUP:
#lower notes UP
if event.key == K_z:
current_played['z'].fadeout(350)
elif event.key == K_c:
current_played['c'].fadeout(350)
elif current_type == SQUARE_WAVE_TYPE:
if event.type == KEYDOWN:
#lower notes DOWN
if event.key == K_z:
print(current_type, 80.81) # added () for Python3
current_played['z'] = MakeSineWave(80.81)
#current_played['z'] = MakeSquareWave(130.81)
current_played['z'].play()
elif event.key == K_c:
print(current_type, 180.81) # added () for Python3
current_played['c'] = MakeSineWave(180.81)
#current_played['c'] = MakeSquareWave(130.81)
current_played['c'].play()
elif event.type == KEYUP:
#lower notes UP
if event.key == K_z:
current_played['z'].fadeout(350)
elif event.key == K_c:
current_played['c'].fadeout(350)
pygame.quit()