ALSA：无法打开音频设备：没有这样的文件或目录[重复]

Question

如果我以 root 身份启动我的 python 程序（我必须以 root 身份启动它，因为键盘模块）这个问题产生了：

ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
Stopping program
Stopping program
Traceback (most recent call last):
  File "[...]/run.py", line 26, in <module>
    main()
  File "[...]/run.py", line 11, in main
    GameStateManager.change_gamestate(SetupState())
  File "[...]/src/game_state.py", line 103, in __init__
    self.setup_sound_manager()
  File "[...]/src/game_state.py", line 110, in setup_sound_manager
    GameState.sound_manager = SoundManager()
  File "[...]/src/utils.py", line 253, in __init__
    mixer.init()
pygame.error: ALSA: Couldn't open audio device: No such file or directory

如果我使用

sudo aplay test.wav

手动运行声音，则会出现此错误：

ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave

系统

                    /-                      
                   ooo:                     ----------------------------
                  yoooo/                    OS: ArcoLinux
                 yooooooo                   Kernel: 5.17.4-arch1-1
                yooooooooo                  Uptime: 3 days, 23 hours, 2 mins
               yooooooooooo                 Packages: 1373 (pacman)
             .yooooooooooooo                Shell: zsh 5.8.1
            .oooooooooooooooo               Resolution: 1920x1080
           .oooooooarcoooooooo              WM: i3
          .ooooooooo-oooooooooo             Theme: Arc-Dark [GTK2/3]
         .ooooooooo-  oooooooooo            Icons: Sardi-Arc [GTK2/3]
        :ooooooooo.    :ooooooooo           Terminal: alacritty
       :ooooooooo.      :ooooooooo          CPU: AMD Ryzen 5 2500U with Radeon Vega Mobile Gfx (8) @ 2.000GHz
      :oooarcooo         .oooarcooo         GPU: AMD ATI Radeon Vega Series / Radeon Vega Mobile Series
     :ooooooooy           .ooooooooo        Memory: 2015MiB / 6904MiB (29%)
    :ooooooooo   /ooooooooooooooooooo
   :ooooooooo      .-ooooooooooooooooo.
  ooooooooo-             -ooooooooooooo.
 ooooooooo-                 .-oooooooooo.
ooooooooo.                     -ooooooooo

Answer 1

尝试提供声音文件的完整路径。如：

your/full/path/to/file/test.wav

如果这不起作用，您的 SDL 默认声音驱动程序是

alsa

。您可以使用此命令更改声音驱动程序：

import os
os.environ['SDL_AUDIODRIVER'] = 'dsp'
# Your code

将这两行放在代码的最前面。

Answer 2

您必须使用

pygame.init()

初始化 pygame 才能使用混音器。