我正在尝试通过 USB 声卡 (umc404) 录制我的吉他，但 Jack 似乎不知道我的声卡的任何输入。我正在使用 Ardour5 的 UI 来启动 Jack。
@Linux-PC:~$ jack_lsp
system:capture_1
system:capture_2
system:capture_3
system:capture_4
system:playback_1
system:playback_2
system:playback_3
system:playback_4
ALSA 似乎认出了它们（？）：
Linux-PC:~$ amixer -c2
Simple mixer control 'Mic',0
Capabilities: cvolume cswitch
Capture channels: Front Left - Front Right - Rear Left - Rear Right
Limits: Capture 0 - 127
Front Left: Capture 127 [100%] [0.00dB] [on]
Front Right: Capture 127 [100%] [0.00dB] [on]
Rear Left: Capture 127 [100%] [0.00dB] [on]
Rear Right: Capture 127 [100%] [0.00dB] [on]
Simple mixer control 'Mic',1
Capabilities: cvolume cvolume-joined cswitch cswitch-joined
Capture channels: Mono
Limits: Capture 0 - 127
Mono: Capture 127 [100%] [0.00dB] [on]
Simple mixer control 'UMC404HD 192k Internal Clock Validity',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'UMC404HD 192k Output',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right - Rear Left - Rear Right
Limits: Playback 0 - 127
Mono:
Front Left: Playback 119 [94%] [-8.00dB] [on]
Front Right: Playback 119 [94%] [-8.00dB] [on]
Rear Left: Playback 119 [94%] [-8.00dB] [on]
Rear Right: Playback 119 [94%] [-8.00dB] [on]
Simple mixer control 'UMC404HD 192k Output',1
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 127
Mono: Playback 127 [100%] [0.00dB] [on]
我怎样才能让杰克看到它们？
答案1
正如@ridgy 在上面评论的那样，我必须先禁用 pulseaudio。我用过pulseaudio -k，可能有更优雅的方法，但现在有效了 :)。