当前位置：文江博客话题详情

alsa pulseaudio

为什么当pulseaudio运行时aplay可以工作，而在其他情况下则不能？

发布于 2024-12-01 09:59:14 字数 229 浏览 2 评论 0 原文

我安装了 ubuntu，默认安装了pulseaudio。当pulseaudio运行时，它可以工作： aplay -D hw:2,7 /usr/share/xbmc/sounds/Bursting\ Bubbles/nav.wav

但是当没有pulseaudio守护进程运行时它不会。该命令没有给出错误，但我听不到声音。

hw:2,7 是 Nvidia hdmi 设备。

这是为什么呢？我想不通。

原文

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

如果没有你 2024-12-08 09:59:14

阅读此链接。

它指出 alsa (aplay) 默认配置为将其输出发送到pulseaudio（这是您的声音服务器）。

当您的声音服务器未运行时，您将无法听到您所观察到的声音。

另请参阅“PulseAudio 删除”部分将其与 alsa 分离。

我希望这有帮助。

回复收藏 0 原文

薄暮涼年 2024-12-08 09:59:14

使用 -Dpulse 应该可以达到这样的效果：

aplay -D pulse /usr/share/xbmc/sounds/Bursting\ Bubbles/nav.wav

这样 aplay 应该使用pulseaudio 设备，您应该能够通过 aplay -L 找到该设备

Using -D pulse should do the trick like:

aplay -D pulse /usr/share/xbmc/sounds/Bursting\ Bubbles/nav.wav

That way aplay should use the pulseaudio device which you should be able to find with aplay -L

回复收藏 0 原文

羁绊已千年 2024-12-08 09:59:14

我遇到了完全相同的问题；我使用的是 Ubuntu 11.04 Natty。我禁用了 pulseaudio 启动（例如 10.10 - 如何我用 alsa 替换pulseaudio？ - 询问 Ubuntu 或 PulseAudio - ArchWiki)：

$ cat /etc/pulse/client.conf | grep -ve '^#\|^
在这种情况下，我会得到：
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

$ aplay -L
null
    Discard all samples (playback) or generate zero samples (capture)
default:CARD=Intel
    HDA Intel, ALC269 Analog
    Default Audio Device
front:CARD=Intel,DEV=0
    HDA Intel, ALC269 Analog
    Front speakers
...
hw:CARD=Intel,DEV=0
    HDA Intel, ALC269 Analog
    Direct hardware device without any conversions
plughw:CARD=Intel,DEV=0
    HDA Intel, ALC269 Analog
    Hardware device with all software conversions
...

 ...但是，即使我明确指定了设备 hw0:0，它也应该在设备上播放示例直接通过 ALSA，绕过任何服务器：
aplay -f cd -v -Dhw:0,0 --test-position loop_s16_stereo.wav
...
BUFPOS: avg5507/16508 min0/0 max22016/22016 (22016) (0:0/0)
BUFPOS: avg2754/19261 min0/0 max22016/22016 (22016) (0:0/0)

 ...我什至会看到设备设置 - 和缓冲区位置正在更改 - 但仍然没有声音？甚至 alsamixer 显示所有控件都设置为最大！
好吧，只是偶然，我首先启用了pulseaudio：
pulseaudio --start

 ...大约一分钟的启动完成后，然后启动系统/首选项/声音，或者在这里：
gnome-volume-control

 ...我意识到，在那里，在“输出音量”栏的右侧，有一个“静音”复选框 - 并且已选中！所以我取消选中它，声音测试开始工作；关闭gnome-volume-control，然后再次关闭pulseaudio：
pulseaudio --kill

现在，我无法再启动gnome-volume-control（无论如何） 10.10 - 如何在没有pulseaudio的情况下调整音量？ - 询问 Ubuntu - 显然早期版本允许通过“设备”下拉菜单选择后端：old.png，但较新的没有：new.png 等等； code>pulseaudio，它们总是会失败并显示“等待声音系统响应”）。
但是，现在当我运行 aplay 命令时 - 它会播放（正如它应该的那样）！
此静音显然与 gconf-editor 中 /desktop/gnome/sound/ 路径下的按键有关（请参阅 gnome - 如何从命令行禁用警报音量？ - 询问 Ubuntu），但我不知道哪一个是真的；我只是注意到，目前，enable_esd、event_sounds 和 input_feedback_sounds 都为我进行了检查 - 这显然使得 aplay<即使没有 pulseaudio，/code> 命令也能正常工作。
希望这对某人有帮助，

干杯!

; default-sink =
; default-source =
; default-server =
autospawn = no
; daemon-binary = /usr/bin/pulseaudio
; extra-arguments = --log-target=syslog
; cookie-file =
; enable-shm = yes
; shm-size-bytes = 0 # setting this 0 will use the system-default, usually 64 MiB

$ pgrep pulse
$

在这种情况下，我会得到：

...但是，即使我明确指定了设备 hw0:0，它也应该在设备上播放示例直接通过 ALSA，绕过任何服务器：

...我什至会看到设备设置 - 和缓冲区位置正在更改 - 但仍然没有声音？甚至 alsamixer 显示所有控件都设置为最大！

好吧，只是偶然，我首先启用了pulseaudio：

...大约一分钟的启动完成后，然后启动系统/首选项/声音，或者在这里：

...我意识到，在那里，在“输出音量”栏的右侧，有一个“静音”复选框 - 并且已选中！所以我取消选中它，声音测试开始工作；关闭gnome-volume-control，然后再次关闭pulseaudio：

现在，我无法再启动gnome-volume-control（无论如何） 10.10 - 如何在没有pulseaudio的情况下调整音量？ - 询问 Ubuntu - 显然早期版本允许通过“设备”下拉菜单选择后端：old.png，但较新的没有：new.png 等等； code>pulseaudio，它们总是会失败并显示“等待声音系统响应”）。

但是，现在当我运行 aplay 命令时 - 它会播放（正如它应该的那样）！

此静音显然与 gconf-editor 中 /desktop/gnome/sound/ 路径下的按键有关（请参阅 gnome - 如何从命令行禁用警报音量？ - 询问 Ubuntu），但我不知道哪一个是真的；我只是注意到，目前，enable_esd、event_sounds 和 input_feedback_sounds 都为我进行了检查 - 这显然使得 aplay<即使没有 pulseaudio，/code> 命令也能正常工作。

希望这对某人有帮助，
干杯!

I had the exact same problem; I'm on Ubuntu 11.04 Natty. I had pulseaudio startup disabled (e.g. 10.10 - How can I replace pulseaudio with alsa? - Ask Ubuntu or PulseAudio - ArchWiki):

$ cat /etc/pulse/client.conf | grep -ve '^#\|^
In this context, I'd get:
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

$ aplay -L
null
    Discard all samples (playback) or generate zero samples (capture)
default:CARD=Intel
    HDA Intel, ALC269 Analog
    Default Audio Device
front:CARD=Intel,DEV=0
    HDA Intel, ALC269 Analog
    Front speakers
...
hw:CARD=Intel,DEV=0
    HDA Intel, ALC269 Analog
    Direct hardware device without any conversions
plughw:CARD=Intel,DEV=0
    HDA Intel, ALC269 Analog
    Hardware device with all software conversions
...

... but, even if I specified explicitly device hw0:0, which should play samples on the device directly through ALSA, bypassing any server:
aplay -f cd -v -Dhw:0,0 --test-position loop_s16_stereo.wav
...
BUFPOS: avg5507/16508 min0/0 max22016/22016 (22016) (0:0/0)
BUFPOS: avg2754/19261 min0/0 max22016/22016 (22016) (0:0/0)

... and I'd see even the device settings - AND buffer positions being changed - and still, no sound? And even alsamixer showed all controls set to the max!
Well, just by accident, I first enabled pulseaudio:
pulseaudio --start

... and after like a minute of startup completed, then started System / Preferences / Sound, or here:
gnome-volume-control

... and I realized that there, right by the "Output volume" bar, there is a "Mute" checkbox - and it was checked! So I unchecked it, sound test started working; closed gnome-volume-control and then shut down pulseaudio again:
pulseaudio --kill

Now, I cannot start gnome-volume-control anymore (regardless of the tips in 10.10 - How do I adjust the volume without pulseaudio? - Ask Ubuntu - apparently earlier versions allowed choice of a backend, via "Device" dropdown: old.png, but newer don't: new.png; and so without pulseaudio, they will always fail with "Waiting for sound system to respond"). 
However, NOW when I run the aplay command - it PLAYS (as it is supposed to)!
This mute is apparently related to a key under /desktop/gnome/sound/ path in gconf-editor (see gnome - How to disable Alert volume from the command line? - Ask Ubuntu), but I can't tell which one really; I just note that at the moment, enable_esd, event_sounds and input_feedback_sounds are all checked for me - and this apparently makes the aplay command work properly, even without pulseaudio. 
Hope this helps someone,

Cheers!  

; default-sink =
; default-source =
; default-server =
autospawn = no
; daemon-binary = /usr/bin/pulseaudio
; extra-arguments = --log-target=syslog
; cookie-file =
; enable-shm = yes
; shm-size-bytes = 0 # setting this 0 will use the system-default, usually 64 MiB

$ pgrep pulse
$

In this context, I'd get:

... but, even if I specified explicitly device hw0:0, which should play samples on the device directly through ALSA, bypassing any server:

... and I'd see even the device settings - AND buffer positions being changed - and still, no sound? And even alsamixer showed all controls set to the max!

Well, just by accident, I first enabled pulseaudio:

... and after like a minute of startup completed, then started System / Preferences / Sound, or here:

... and I realized that there, right by the "Output volume" bar, there is a "Mute" checkbox - and it was checked! So I unchecked it, sound test started working; closed gnome-volume-control and then shut down pulseaudio again:

Now, I cannot start gnome-volume-control anymore (regardless of the tips in 10.10 - How do I adjust the volume without pulseaudio? - Ask Ubuntu - apparently earlier versions allowed choice of a backend, via "Device" dropdown: old.png, but newer don't: new.png; and so without pulseaudio, they will always fail with "Waiting for sound system to respond").

However, NOW when I run the aplay command - it PLAYS (as it is supposed to)!

This mute is apparently related to a key under /desktop/gnome/sound/ path in gconf-editor (see gnome - How to disable Alert volume from the command line? - Ask Ubuntu), but I can't tell which one really; I just note that at the moment, enable_esd, event_sounds and input_feedback_sounds are all checked for me - and this apparently makes the aplay command work properly, even without pulseaudio.

Hope this helps someone,
Cheers!

回复收藏 0 原文

~没有更多了~