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jackd 不起作用，aplay -l 显示同一张卡的两个实例（Ubuntu 13.04，仅 HDMI 音频）

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jackd 不起作用，aplay -l 显示同一张卡的两个实例（Ubuntu 13.04，仅 HDMI 音频）

我在 Ubuntu 13.04 上使用 ZaReason Zini，据我所知，除了 HDMI 端口外，没有其他音频输出。我试图让 Clojure 库 Overtone 工作，但遇到了上述问题这里。根本问​​题似乎是 jackd 不起作用：

anand@anand-desktop:~$ jackd -R -d alsa
jackdmp 1.9.10
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2013 Grame.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
no message buffer overruns
no message buffer overruns
no message buffer overruns
JACK server starting in realtime mode with priority 10
audio_reservation_init
Acquire audio card Audio0
creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit
ALSA: Cannot open PCM device alsa_pcm for playback. Falling back to capture-only mode
Cannot initialize driver
JackServer::Open failed with -1
Failed to open server

根据博客文章和其他人针对类似问题给出的建议，我做了aplay -l并看到了

anand@anand-desktop:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

似乎有两个相同卡的实例。执行此操作jackd -R -d alsa -d hw:0会产生原始错误，而任何其他设备编号都会导致

ALSA lib pcm_hw.c:1401:(_snd_pcm_hw_open) Invalid value for card

不幸的是，这意味着博客文章中描述的标准修复对我不起作用。我怎样才能让 jackd 正常工作？

答案1

嗯jackd -R -d alsa -d hw:0,3似乎有效：

jackdmp 1.9.10
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2013 Grame.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
no message buffer overruns
no message buffer overruns
no message buffer overruns
JACK server starting in realtime mode with priority 10
audio_reservation_init
Acquire audio card Audio0
creating alsa driver ... hw:0,3|hw:0,3|1024|2|48000|0|0|nomon|swmeter|-|32bit
ALSA: Cannot open PCM device alsa_pcm for capture. Falling back to playback-only mode
configuring for 48000Hz, period = 1024 frames (21.3 ms), buffer = 2 periods
ALSA: final selected sample format for playback: 16bit little-endian
ALSA: use 2 periods for playback

我想我现在需要弄清楚如何让 Overtone 使用这个额外的选项。

答案2

对我来说，将 QjackCtl 设置中的输出设备从（默认）更改为 HW:PCH,0 即可解决问题。

以下是输出aplay -l：

**** List of PLAYBACK Hardware Devices ****
card 0: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 0: VT1802 Analog [VT1802 Analog]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 2: VT1802 Alt Analog [VT1802 Alt Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

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