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来源：互联网发布：java try是干什么的编辑：程序博客网时间：2024/05/16 12:11

在Linux上，对着这个做的时候
http://blog.sina.com.cn/s/blog_40793e970102w3m2.html
出了这么一个问题，我来慢慢解决。

ALSA lib setup.c:548:(add_elem) Cannot obtain info for CTL elem (MIXER,'AC97 2ch->4ch Copy Switch',0,0,0): No such file or directoryALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfeALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.sideALSA lib setup.c:548:(add_elem) Cannot obtain info for CTL elem (MIXER,'AC97 2ch->4ch Copy Switch',0,0,0): No such file or directoryALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround41ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround50ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround51ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround71ALSA lib setup.c:548:(add_elem) Cannot obtain info for CTL elem (PCM,'IEC958 Playback PCM Stream',0,0,0): No such file or directoryALSA lib setup.c:548:(add_elem) Cannot obtain info for CTL elem (PCM,'IEC958 Playback PCM Stream',0,0,0): No such file or directoryALSA lib setup.c:548:(add_elem) Cannot obtain info for CTL elem (PCM,'IEC958 Playback PCM Stream',0,0,0): No such file or directoryALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmiALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmiALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modemALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modemALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phonelineALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phonelinebt_audio_service_open: connect() failed: Connection refused (111)bt_audio_service_open: connect() failed: Connection refused (111)bt_audio_service_open: connect() failed: Connection refused (111)bt_audio_service_open: connect() failed: Connection refused (111)

这边讨论的比较全，虽然还没解决。
https://github.com/Katee/quietnet/issues/18
1. 其中提及
bt_audio_service_open: connect() failed: Connection refused (111)” refers to your bluetooth device - you are likely missing some bluethooth packages, but you can simply ignore it.

ALSA是什么？

Advanced Linux Sound Architecture，高级Linux声音架构的简称,它在Linux操作系统上提供了音频和MIDI（Musical Instrument Digital Interface，音乐设备数字化接口）的支持。

portaudio安装

先找到源码包
http://blog.csdn.net/nemo2011/article/details/7384501

额，这东西不能在虚拟机上装。。

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