Re: [pygame] Incrementing the frequency of the Pygame.mixer with a Loop?

[Brian Gryder <bgryderclock@xxxxxxxxx>]

pygame.quit() worked! I can now hear the pitch changing, Thanks!
Is there a way to do this without closing the pygame window everytime it loops?

Here is the working code with the pygame window closing and reopening each loop:
----------------------------------------
import pygame
from pygame.locals import *
from sys import exit

screen = pygame.display.set_mode((800, 600), 0, 32)
frequency = 44100
while True:
   frequency = frequency + 2000
   print frequency
   pygame.mixer.pre_init(frequency, 16, 2, 4096)
   pygame.init()
   test_sound = pygame.mixer.Sound("check.wav")
   mychannel = test_sound.play()
   while pygame.mixer.get_busy() == True:
       pass
   pygame.quit()
   screen = pygame.display.set_mode((800, 600), 0, 32) #to reopen the closed window. 
----------------------------------------------------------------------

On Thu, Jul 9, 2009 at 8:22 PM, Lenard Lindstrom <len-l@xxxxxxxxx> wrote:

Hi,

You have pygame.quit instead of pygame.quit() .

Lenard

Brian Gryder wrote:

Thanks for the reply Lenard,  I tried your suggestion and the pitch is still not changing as the frequency increments with the loop.

This is a strange issue. if I manually change the value if frequency before I run it, the sound changes. it is as if the pygame.mixer's parameters are "Stuck"and can't be changed during runtime. Is there a way I can verify that the pygame.mixer and the sound objects are unloaded before I restart the loop?

Is there anything else I can try? Any links or snippet of code would be greatly appreciated.

Here is the updated program
---------------------------------------------
import pygame
from pygame.locals import *
from sys import exit

#pgyame.display.set_mode must also come after the pygame.init. The display is not necessary for mixer though. -Lenard
#screen = pygame.display.set_mode((800, 600), 0, 32)
frequency = 44100
while True:
   frequency = frequency + 2000
   print frequency
   pygame.mixer.pre_init(frequency, 16, 2, 4096)
   pygame.init()
   test_sound = pygame.mixer.Sound("check.wav")
   mychannel = test_sound.play()
   while pygame.mixer.get_busy() == True:
       pass
   pygame.quit # "do a pygame.quit rather than pygame.mixer.quit for each loop -Lenard

   -------------------------------------------------------------------------------------------

On Wed, Jul 8, 2009 at 2:26 AM, Lenard Lindstrom <len-l@xxxxxxxxx <mailto:len-l@xxxxxxxxx>> wrote:

   Hi Brian,

   You would probably have to do a pygame.quit rather than
   pygame.mixer.quit for each pass of the loop. The
   pgyame.display.set_mode must also come after the pygame.init. The
   display is not necessary for mixer though.

   Lenard


   Brian Gryder wrote:

       '''
       How do I change the frequency of the Pygame.mixer by
       incrementing the frequency value in a loop?

       Please see the example below where I am trying to initialize
       the frequency at 44100 and then add 2000 to the frequency each
       time it loops. In this example below the pitch does not
       change, I really want it to change.

       Any links or snippet of code would be greatly appreciated, Thanks!
        '''

       import pygame
       from pygame.locals import *
       from sys import exit

       screen = pygame.display.set_mode((800, 600), 0, 32)
       frequency = 44100

       while True:

          frequency = frequency + 2000
          print frequency

          pygame.mixer.pre_init(frequency, 16, 2, 4096)
          pygame.init()
          test_sound = ""
          test_sound = pygame.mixer.Sound("check.wav")
          mychannel = test_sound.play()

          while pygame.mixer.get_busy() == True:
              pass
              #"passing"

          pygame.mixer.quit