更新：今天的升级alsa-lib-1.1.7-2解决了这个问题。 (2018-11-23)
Arch Linux，最新的。与往常一样，-Syu升级再次破坏了一切。这次是大胆。通常是大胆的，并且任何其他播放/录制应用程序将出现在pauvcontrol- 不再大胆。我可以使用pauvcontrolaudacity 选择要从中录制或播放音频的接收器和源 - 不再是了。
在无畏的偏好中，它只ALSA在顶部下拉菜单中说，我不确定这是否应该是这样或者是否PulseAudio之前说过。播放选项卡中甚至没有我的所有设备。录音设备选择也是如此，但是我需要录音的环回设备就在那里，所以可以工作。
但现在我也想播放大胆的声音，但它不再起作用了。它没有列出我的 USB 播放设备，当我将其设置为时，sysdefault我只是收到错误消息。
$ pulseaudio -v
pulseaudio 12.2
$ audacity --version
lilv_world_add_plugin(): warning: Duplicate plugin <http://lv2plug.in/plugins/eg-params>
lilv_world_add_plugin(): warning: ... found in file:///usr/lib/lv2/eg-params.lv2/
lilv_world_add_plugin(): warning: ... and file:///usr/lib64/lv2/eg-params.lv2/ (ignored)
lilv_world_add_plugin(): warning: Duplicate plugin <http://lv2plug.in/plugins/eg-midigate>
lilv_world_add_plugin(): warning: ... found in file:///usr/lib/lv2/eg-midigate.lv2/
lilv_world_add_plugin(): warning: ... and file:///usr/lib64/lv2/eg-midigate.lv2/ (ignored)
lilv_world_add_plugin(): warning: Duplicate plugin <http://lv2plug.in/plugins/eg-fifths>
lilv_world_add_plugin(): warning: ... found in file:///usr/lib/lv2/eg-fifths.lv2/
lilv_world_add_plugin(): warning: ... and file:///usr/lib64/lv2/eg-fifths.lv2/ (ignored)
lilv_world_add_plugin(): warning: Duplicate plugin <http://lv2plug.in/plugins/eg-metro>
lilv_world_add_plugin(): warning: ... found in file:///usr/lib/lv2/eg-metro.lv2/
lilv_world_add_plugin(): warning: ... and file:///usr/lib64/lv2/eg-metro.lv2/ (ignored)
lilv_world_add_plugin(): warning: Duplicate plugin <http://lv2plug.in/plugins/eg-amp>
lilv_world_add_plugin(): warning: ... found in file:///usr/lib/lv2/eg-amp.lv2/
lilv_world_add_plugin(): warning: ... and file:///usr/lib64/lv2/eg-amp.lv2/ (ignored)
lilv_world_add_plugin(): warning: Duplicate plugin <http://lv2plug.in/plugins/eg-sampler>
lilv_world_add_plugin(): warning: ... found in file:///usr/lib/lv2/eg-sampler.lv2/
lilv_world_add_plugin(): warning: ... and file:///usr/lib64/lv2/eg-sampler.lv2/ (ignored)
lilv_world_add_plugin(): warning: Duplicate plugin <http://lv2plug.in/plugins/eg-scope#Mono>
lilv_world_add_plugin(): warning: ... found in file:///usr/lib/lv2/eg-scope.lv2/
lilv_world_add_plugin(): warning: ... and file:///usr/lib64/lv2/eg-scope.lv2/ (ignored)
lilv_world_add_plugin(): warning: Duplicate plugin <http://lv2plug.in/plugins/eg-scope#Stereo>
lilv_world_add_plugin(): warning: ... found in file:///usr/lib/lv2/eg-scope.lv2/
lilv_world_add_plugin(): warning: ... and file:///usr/lib64/lv2/eg-scope.lv2/ (ignored)
lilv_world_add_plugin(): warning: Reloading plugin <http://lv2plug.in/plugins/eg-params>
lilv_world_add_plugin(): warning: Reloading plugin <http://lv2plug.in/plugins/eg-midigate>
lilv_world_add_plugin(): warning: Reloading plugin <http://lv2plug.in/plugins/eg-fifths>
lilv_world_add_plugin(): warning: Reloading plugin <http://lv2plug.in/plugins/eg-metro>
lilv_world_add_plugin(): warning: Reloading plugin <http://lv2plug.in/plugins/eg-amp>
lilv_world_add_plugin(): warning: Reloading plugin <http://lv2plug.in/plugins/eg-sampler>
lilv_world_add_plugin(): warning: Reloading plugin <http://lv2plug.in/plugins/eg-scope#Mono>
lilv_world_add_plugin(): warning: Reloading plugin <http://lv2plug.in/plugins/eg-scope#Stereo>
不确定这些警告是否意味着什么，它不会打印版本。
包裹是audacity-2.3.0-1-x86_64.pkg.tar.xz
启动 audacity 时控制台的完整日志：
ALSA lib pcm_dmix.c:1099:(snd_pcm_dmix_open) unable to open slave
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.Loopback.pcm.iec958.0:CARD=0,AES0=4,AES1=130,AES2=0,AES3=2'
ALSA lib conf.c:4555:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5034:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM iec958
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.Loopback.pcm.iec958.0:CARD=0,AES0=4,AES1=130,AES2=0,AES3=2'
ALSA lib conf.c:4555:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5034:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM spdif
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.Loopback.pcm.iec958.0:CARD=0,AES0=4,AES1=130,AES2=0,AES3=2'
ALSA lib conf.c:4555:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5034:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM spdif
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.Loopback.pcm.hdmi.0:CARD=0,AES0=4,AES1=130,AES2=0,AES3=2'
ALSA lib conf.c:4555:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5034:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM hdmi
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.Loopback.pcm.hdmi.0:CARD=0,AES0=4,AES1=130,AES2=0,AES3=2'
ALSA lib conf.c:4555:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5034:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM hdmi
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.Loopback.pcm.modem.0:CARD=0'
ALSA lib conf.c:4555:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5034:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline:CARD=0,DEV=0
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.Loopback.pcm.modem.0:CARD=0'
ALSA lib conf.c:4555:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5034:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline:CARD=0,DEV=0
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.Loopback.pcm.modem.0:CARD=0'
ALSA lib conf.c:4555:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5034:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM phoneline
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.Loopback.pcm.modem.0:CARD=0'
ALSA lib conf.c:4555:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5034:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM phoneline
connect(2) call to /dev/shm/jack-1000/default/jack_0 failed (err=No such file or directory)
attempt to connect to server failed
connect(2) call to /dev/shm/jack-1000/default/jack_0 failed (err=No such file or directory)
attempt to connect to server failed
ALSA lib pcm_oss.c:377:(_snd_pcm_oss_open) Unknown field port
ALSA lib pcm_oss.c:377:(_snd_pcm_oss_open) Unknown field port
Expression 'alsa_snd_pcm_hw_params_set_period_size_near( pcm, hwParams, &alsaPeriodFrames, &dir )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 924
ALSA lib pcm_usb_stream.c:486:(_snd_pcm_usb_stream_open) Invalid type for card
ALSA lib pcm_usb_stream.c:486:(_snd_pcm_usb_stream_open) Invalid type for card
ALSA lib pcm_dmix.c:1099:(snd_pcm_dmix_open) unable to open slave
Expression 'alsa_snd_pcm_hw_params_set_period_size_near( pcm, hwParams, &alsaPeriodFrames, &dir )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 924
connect(2) call to /dev/shm/jack-1000/default/jack_0 failed (err=No such file or directory)
attempt to connect to server failed
尽管我不确定这些错误是否是由于 ALSA 造成的，并且可能与 PulseAudio 问题完全无关。
答案1
答案2
我正在运行 1.1.8-1 的 alsalibs，并且遇到了类似的问题。开始大胆改变我的输出到内部扬声器。我让它与 一起工作alsactl restore，pulseaudio -k但是它很不稳定。 VLC 和 audacity 似乎无法同时使用输出。