很长一段时间以来，Studio Controls (2.3.1) 应用程序都无法启动 Jack。这是从 Ubuntu Studio 升级开始的。我认为最新的两个版本都是这样的。我现在运行的是 22.04 版本。
我有两个音频接口，Behringer UCM1820 和 Native Instruments Audio 2 DJ gen 1。Qjackctl 运行良好，幸运的是，我可以用它连接电脑。设置桥接器等似乎很麻烦。
我有一台 HP Elitedesk I7 6700，在过去进行一些主要版本更新之前，一切都运行良好。
5.15.0-50-lowlatency #56-Ubuntu SMP PREEMPT Wed Sep 21 13:57:05 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
convert-studio-controls 的输出
Convert Studio Conrols Config File (version 2.3.1)
Search for: /home/kim/.config/autojack/autojack.json force: False
config file found, check it
checking config file for compatability with version 2.3.1
checking data base
Checking Devices
Devices checked, continue data base check
write new config file
尝试在 Studio Controls 中启动 JACK 后，输出到 autojack.log 中（日志记录级别额外）：
2022-10-17 16:06:18,540 - AutoJack - INFO - Autojack started: logging started
2022-10-17 16:06:22,579 - AutoJack - DEBUG - check config file: Convert Studio Conrols Config File (version 2.3.1)
Search for: /home/kim/.config/autojack/autojack.json force: False
config file found, check it
checking config file for compatability with version 2.3.1
checking data base
Checking Devices
Devices checked, continue data base check
write new config file
2022-10-17 16:06:22,579 - AutoJack - DEBUG - Checking for phones plugged in
2022-10-17 16:06:22,579 - AutoJack - Level 7 - log level: 7
2022-10-17 16:06:22,580 - AutoJack - Level 7 - Device scan found:
2022-10-17 16:06:22,580 - AutoJack - Level 7 - Device scan found: UMC1820
2022-10-17 16:06:22,581 - AutoJack - Level 7 - {
"version": "2.3.1",
"log-level": "7",
"jack": {
"on": true,
"driver": "alsa",
"chan-in": 1,
"chan-out": 1,
"rate": 44100,
"frame": 1024,
"period": 3,
"connect-mode": "n",
"dev": "none",
"usbdev": "USB1,0,0",
"cap-latency": 0,
"play-latency": 0
},
"extra": {
"a2j": true,
"usbauto": false,
"usb-single": false,
"monitor": "system:playback_1",
"phone-action": "switch",
"phone-device": "none",
"usbnext": 2,
"a2j_u": false
},
"pulse": {
"inputs": {
"pulse_in": {
"connection": "system:capture_1",
"count": 2
}
},
"outputs": {
"pulse_out": {
"connection": "system:playback_1",
"count": 2
}
}
},
"devices": {
"USB1": {
"number": 1,
"usb": true,
"internal": false,
"hdmi": false,
"firewire": false,
"rates": [
"44100",
"48000",
"88200",
"96000"
],
"min_latency": 32,
"id": "1397:0503",
"bus": "001",
"sub": {
"0": {
"name": "UMC1820,0,0",
"playback": true,
"capture": true,
"rate": 44100,
"frame": 1024,
"nperiods": 3,
"hide": false,
"cap-latency": 0,
"play-latency": 0,
"play-chan": 100,
"cap-chan": 100,
"play-pid": 0,
"cap-pid": 0
}
},
"raw": "UMC1820"
},
"": {
"number": 0,
"usb": false,
"internal": false,
"hdmi": false,
"firewire": false,
"min_latency": 16,
"rates": [
"32000",
"44100",
"48000",
"88200",
"96000",
"192000"
],
"raw": "",
"id": "none",
"bus": "none",
"sub": {}
}
},
"znet": {},
"mnet": {
"type": "jack",
"count": 0
}
}
2022-10-17 16:06:22,581 - AutoJack - Level 7 - Device scan found:
2022-10-17 16:06:22,581 - AutoJack - Level 7 - Device scan found: UMC1820
所以对我来说，该应用程序只是扫描接口并识别它们，但似乎甚至没有尝试运行 JACK？
在 Studio Controls 的“JACK Master 设置”选项卡中，“JACK Master 设备（无 USB）”下拉框显示为灰色，但在“应为主设备的 USB 设备”中，选择了正确的接口“USB1 1397:0503 001 UMC1820,0,0 捕获和播放”。
由于我删除了 autojack.json，希望消除它可能对此产生的任何影响，因此 Audio2DJ 没有显示在这些日志中。
autojack.json 的当前内容
"version": "2.3.1",
"log-level": "7",
"jack": {
"on": true,
"driver": "alsa",
"chan-in": 1,
"chan-out": 1,
"rate": 44100,
"frame": 1024,
"period": 3,
"connect-mode": "n",
"dev": "none",
"usbdev": "USB1,0,0",
"cap-latency": 0,
"play-latency": 0
},
"extra": {
"a2j": true,
"usbauto": false,
"usb-single": false,
"monitor": "system:playback_1",
"phone-action": "switch",
"phone-device": "none",
"usbnext": 2,
"a2j_u": false
},
"pulse": {
"inputs": {
"pulse_in": {
"connection": "system:capture_1",
"count": 2
}
},
"outputs": {
"pulse_out": {
"connection": "monitor",
"count": 2
}
}
},
"devices": {
"USB1": {
"number": 1,
"usb": true,
"internal": false,
"hdmi": false,
"firewire": false,
"rates": [
"44100",
"48000",
"88200",
"96000"
],
"min_latency": 32,
"id": "1397:0503",
"bus": "001",
"sub": {
"0": {
"name": "UMC1820,0,0",
"playback": true,
"capture": true,
"rate": 44100,
"frame": 1024,
"nperiods": 3,
"hide": false,
"cap-latency": 0,
"play-latency": 0,
"play-chan": 100,
"cap-chan": 100,
"play-pid": 0,
"cap-pid": 0
}
},
"raw": "UMC1820"
},
"": {
"number": 0,
"usb": false,
"internal": false,
"hdmi": false,
"firewire": false,
"min_latency": 16,
"rates": [
"32000",
"44100",
"48000",
"88200",
"96000",
"192000"
],
"raw": "",
"id": "none",
"bus": "none",
"sub": {}
}
},
"znet": {},
"mnet": {
"type": "jack",
"count": 0
}
}
``