我正在尝试Tascam US-122L USB 2.0 音频/MIDI 接口与 jackd 合作。
当我插入设备时似乎加载了正确的内核模块：
$ lsmod | grep us122l
snd_usb_us122l 23020 0
snd_usbmidi_lib 29476 1 snd_usb_us122l
snd_hwdep 17709 2 snd_usb_us122l,snd_hda_codec
snd 78957 18 snd_usb_us122l,snd_usbmidi_lib,snd_hda_codec_analog,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
ALSA 似乎检测到了该卡：
$ cat /proc/asound/cards
0 [SB ]: HDA-Intel - HDA ATI SB
HDA ATI SB at 0x60000000 irq 16
1 [US122L ]: USB US-122L - TASCAM US-122L
TASCAM US-122L (644:800e if 0 at 001/004)
还：
$ aplay -L
default
Playback/recording through the PulseAudio sound server
sysdefault:CARD=SB
HDA ATI SB, AD198x Analog
Default Audio Device
front:CARD=SB,DEV=0
HDA ATI SB, AD198x Analog
Front speakers
surround40:CARD=SB,DEV=0
HDA ATI SB, AD198x Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=SB,DEV=0
HDA ATI SB, AD198x Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=SB,DEV=0
HDA ATI SB, AD198x Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=SB,DEV=0
HDA ATI SB, AD198x Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=SB,DEV=0
HDA ATI SB, AD198x Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
dmix:CARD=SB,DEV=0
HDA ATI SB, AD198x Analog
Direct sample mixing device
dsnoop:CARD=SB,DEV=0
HDA ATI SB, AD198x Analog
Direct sample snooping device
hw:CARD=SB,DEV=0
HDA ATI SB, AD198x Analog
Direct hardware device without any conversions
plughw:CARD=SB,DEV=0
HDA ATI SB, AD198x Analog
Hardware device with all software conversions
usb_stream:CARD=SB
HDA ATI SB
usb_stream:CARD=US122L
TASCAM US-122L
该卡也出现在 中qjackctl，但是当我选择它作为接口并尝试启动 jackd 时，出现以下错误：
16:37:20.811 D-BUS: JACK server could not be started. Sorry
Cannot connect to server socket err = No such file or directory
Cannot connect to server socket
jack server is not running or cannot be started
Fri Jun 20 16:37:20 2014: Starting jack server...
Fri Jun 20 16:37:20 2014: JACK server starting in realtime mode with priority 10
Fri Jun 20 16:37:20 2014: control device hw:1
Fri Jun 20 16:37:20 2014: control device hw:1
Fri Jun 20 16:37:20 2014: Acquired audio card Audio1
Fri Jun 20 16:37:20 2014: creating alsa driver ... hw:1|hw:1|1024|2|44100|0|0|nomon|swmeter|-|32bit
Fri Jun 20 16:37:20 2014: control device hw:1
Fri Jun 20 16:37:20 2014: ERROR: ALSA: Cannot open PCM device alsa_pcm for playback. Falling back to capture-only mode
Fri Jun 20 16:37:20 2014: ERROR: Cannot initialize driver
Fri Jun 20 16:37:20 2014: ERROR: JackServer::Open() failed with -1
Fri Jun 20 16:37:20 2014: ERROR: Failed to open server
Fri Jun 20 16:37:21 2014: Saving settings to "/home/kraxor/.config/jack/conf.xml" ...
16:37:36.683 Could not connect to JACK server as client. - Overall operation failed. - Unable to connect to server. Please check the messages window for more info.
Cannot connect to server socket err = No such file or directory
Cannot connect to server socket
jack server is not running or cannot be started
尝试修改/etc/security/limits.conf并~/.asoundrc根据回答这个问题，但这并没有解决问题。目前它们看起来像这样：
$ cat .asoundrc | grep -v \#
pcm.!usb_stream {
@args [ CARD ]
@args.CARD {
type string
default "1"
}
type usb_stream
card $CARD
}
ctl.!usb_stream {
@args [ CARD ]
@args.CARD {
type string
default "1"
}
type hw
card $CARD
}
$ cat /etc/security/limits.conf | grep -v \#
@audio - rtpio 99
@audio - memlock unlimited
@audio - nice -10
Xubuntu 14.04 和 Ubuntu Studio 12.04 也出现了同样的情况。
任何建议都非常感谢。此卡应该据我所知，支持。
答案1
- 如果 Pulseaudio 正在运行，您可能会遇到此问题。
要停止它进行测试，请运行 2 个命令：
echo autospawn=no > ~/.pulse/client.conf
pulseaudio -k