Mixer is not accurate in playing audio at a rate.

[qaqFei]

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Environment:

If possible, please include the output of pygame.print_debug_info() from your program in your bug report. It looks something like this:

pygame-ce 2.5.2 (SDL 2.30.8, Python 3.12.8)
Platform:		Windows 10
System:			Windows
System Version:	10.0.19042.508
Processor:		Genuine Intel(R) 0000 @ 1.80GHz
Architecture:	Bits: 64bit	Linkage: WindowsPE

Python:			    CPython 3.12.8 (tags/v3.12.8:2dc476b, Dec  3 2024, 19:30:04) [MSC v.1942 64 bit (AMD64)] on win32
pygame version:		 2.5.2
SDL versions:		2.30.8.0
SDL Mixer versions:	2.8.0.0

Mixer Driver:		unknow

If you can't get the debug output, any of the environment details included in it that you do know would be useful in diagnosing the issue & helping you.

Other environment details, not included in print_debug_info(), that might help:

• Relevant hardware (e.g. if reporting a bug about a controller, tell us the brand & name of it):

Current behavior: The latency of the Mixer get_pos gradually increases, disappearing when the Mixer is reset (i.e., get_pos reset to zero)

Screenshots

directsound:

https://github.com/user-attachments/assets/20524a10-9ef0-4df3-93c6-32dceb4f2714

sdl2_mixer:

https://github.com/user-attachments/assets/1fb6f05e-188f-4220-ac02-4f96882f6e47

Steps to reproduce:

Please explain the steps required to duplicate the issue, especially if you are able to provide a sample application. if the bug is caused by a specific file (image, font, sound, level, please upload it as an attachment

1. Load a long audio file
2. Play it
3. Wait playing...

Test code

If possible add a simple test program that shows the problem described in this report.

import time
from pygame import mixer

mixer.init()

mixer.music.load("a_long_music.mp3")
mixer.music.play()
while not mixer.music.get_busy(): ...

start_time = time.time()

while mixer.music.get_busy():
    # There is no error here.
    print(time.time() - start_time, mixer.music.get_pos() / 1000)

# If the length of that audio is 3600s, the variable "use_time" will be greater than 3600s
use_time = time.time() - start_time

Stack trace/error output/other error logs

paste other relevant logs or stack traces here, if applicable