Python PyAudio没有默认的输出设备

我在让pyaudio在Ubuntu机器上工作时遇到了麻烦（值得信赖）。尝试使用pyaudio文档页面上的blocking wave player代码，我得到：

Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
Traceback (most recent call last):
 File "./pyaudio-play.py", line 22, in <module>
   output=True)
 File "/usr/lib/python2.7/dist-packages/pyaudio.py", line 747, in open
   stream = Stream(self, *args, **kwargs)
 File "/usr/lib/python2.7/dist-packages/pyaudio.py", line 442, in __init__
   self._stream = pa.open(**arguments)
IOError: [Errno Invalid output device (no default output device)] -9996

但它们似乎都能起作用（即一张唱片和另一张剧本）

我确实有注册设备

$cat/proc/asound/cards

 0 [PCH            ]: HDA-Intel - HDA Intel
PCH
                      HDA Intel PCH at 0xf9120000 irq 81  1 [NVidia         ]: HDA-Intel - HDA NVidia
                      HDA NVidia at 0xfb080000 irq 36  2 [Mic            ]: USB-Audio - Samson Meteor Mic
                      Samson Technologies Samson Meteor Mic at usb-0000:00:1d.0-1.1, full speed  3 [NVidia_1       ]: HDA-Intel - HDA
NVidia
                      HDA NVidia at 0xf9080000 irq 44

（很抱歉，这篇文章中的新行不能正常工作）

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有什么想法吗？

必须安装portaudio19-dev。这似乎工作了一分钟，然后又坏了

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看起来声音系统被搞砸了；重新启动一堆东西（alsa、pulseaudio）似乎已经修复了它，至少现在是这样。

我安装了portaudio-dev19，它似乎可以工作，但当我重新登录时，我又遇到了同样的问题。奇怪。

 0 [PCH            ]: HDA-Intel - HDA Intel
PCH
                      HDA Intel PCH at 0xf9120000 irq 81  1 [NVidia         ]: HDA-Intel - HDA NVidia
                      HDA NVidia at 0xfb080000 irq 36  2 [Mic            ]: USB-Audio - Samson Meteor Mic
                      Samson Technologies Samson Meteor Mic at usb-0000:00:1d.0-1.1, full speed  3 [NVidia_1       ]: HDA-Intel - HDA
NVidia
                      HDA NVidia at 0xf9080000 irq 44