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

[Brian Gryder <bgryderclock@xxxxxxxxx>]

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> 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